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href="#常序列生成函数">常序列生成函数</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#选择函数">选择函数</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#区间查询函数">区间查询函数</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#趋势计算函数">趋势计算函数</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#采样函数">采样函数</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#时间序列处理函数">时间序列处理函数</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#数据质量函数库">数据质量函数库</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#数据质量">数据质量</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#数据画像">数据画像</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#异常检测">异常检测</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#频域分析">频域分析</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#数据匹配">数据匹配</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#数据修复">数据修复</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#序列发现">序列发现</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#机器学习">机器学习</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#lambda-表达式">Lambda 表达式</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#条件表达式">条件表达式</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#触发器">触发器</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#使用-sql-语句注册该触发器">使用 SQL 语句注册该触发器</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#卸载触发器">卸载触发器</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#查询触发器">查询触发器</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#连续查询-continuous-query-cq">连续查询（Continuous Query, CQ）</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#语法">语法</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#连续查询的管理">连续查询的管理</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#用户自定义函数">用户自定义函数</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#udfparameters">UDFParameters</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#udf-注册">UDF 注册</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#udf-卸载">UDF 卸载</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#udf-查询">UDF 查询</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#查看所有注册的-udf">查看所有注册的 UDF</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#权限管理">权限管理</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#_1、创建用户">1、创建用户</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#_2、展示用户">2、展示用户</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#_3、赋予用户权限">3、赋予用户权限</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#_4、撤销用户权限">4、撤销用户权限</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#_5、sql-语句">5、SQL 语句</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#_6、非root用户限制进行的操作">6、非root用户限制进行的操作</a></li><!----><!--]--></ul></li><!--]--></ul><div class="vp-toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!--[--><!----><!--]--><div class="theme-hope-content"><h1 id="sql手册" tabindex="-1"><a class="header-anchor" href="#sql手册"><span>SQL手册</span></a></h1><h2 id="元数据操作" tabindex="-1"><a class="header-anchor" href="#元数据操作"><span>元数据操作</span></a></h2><h3 id="_1、数据库管理" tabindex="-1"><a class="header-anchor" href="#_1、数据库管理"><span>1、数据库管理</span></a></h3><h4 id="创建数据库" tabindex="-1"><a class="header-anchor" href="#创建数据库"><span>创建数据库</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">CREATE</span> <span class="token keyword">DATABASE</span> root<span class="token punctuation">.</span>ln

 <span class="token keyword">CREATE</span> <span class="token keyword">DATABASE</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01
 <span class="token operator">&gt;</span> Msg: <span class="token number">300</span>: root<span class="token punctuation">.</span>ln has already been created <span class="token keyword">as</span> <span class="token keyword">database</span><span class="token punctuation">.</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="查看数据库" tabindex="-1"><a class="header-anchor" href="#查看数据库"><span>查看数据库</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">show</span> <span class="token keyword">databases</span>
 <span class="token keyword">show</span> <span class="token keyword">databases</span> root<span class="token punctuation">.</span><span class="token operator">*</span>
 <span class="token keyword">show</span> <span class="token keyword">databases</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="删除数据库" tabindex="-1"><a class="header-anchor" href="#删除数据库"><span>删除数据库</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">DELETE</span> <span class="token keyword">DATABASE</span> root<span class="token punctuation">.</span>ln
 <span class="token keyword">DELETE</span> <span class="token keyword">DATABASE</span> root<span class="token punctuation">.</span>sgcc
 <span class="token keyword">DELETE</span> <span class="token keyword">DATABASE</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="统计数据库数量" tabindex="-1"><a class="header-anchor" href="#统计数据库数量"><span>统计数据库数量</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>count <span class="token keyword">databases</span>
 count <span class="token keyword">databases</span> root<span class="token punctuation">.</span><span class="token operator">*</span>
 count <span class="token keyword">databases</span> root<span class="token punctuation">.</span>sgcc<span class="token punctuation">.</span><span class="token operator">*</span>
 count <span class="token keyword">databases</span> root<span class="token punctuation">.</span>sgcc
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_2、时间序列管理" tabindex="-1"><a class="header-anchor" href="#_2、时间序列管理"><span>2、时间序列管理</span></a></h3><h4 id="创建时间序列" tabindex="-1"><a class="header-anchor" href="#创建时间序列"><span>创建时间序列</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span>temperature <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">FLOAT</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>RLE
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span>wt02<span class="token punctuation">.</span>hardware <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">TEXT</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span>wt02<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sgcc<span class="token punctuation">.</span>wf03<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sgcc<span class="token punctuation">.</span>wf03<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span>temperature <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">FLOAT</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>RLE
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>简化版</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">BOOLEAN</span> encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span>temperature <span class="token keyword">FLOAT</span> encoding<span class="token operator">=</span>RLE
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span>wt02<span class="token punctuation">.</span>hardware <span class="token keyword">TEXT</span> encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span>wt02<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">BOOLEAN</span> encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sgcc<span class="token punctuation">.</span>wf03<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">BOOLEAN</span> encoding<span class="token operator">=</span>PLAIN
 <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sgcc<span class="token punctuation">.</span>wf03<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span>temperature <span class="token keyword">FLOAT</span> encoding<span class="token operator">=</span>RLE
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>错误提示</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span>wt02<span class="token punctuation">.</span><span class="token keyword">status</span> <span class="token keyword">WITH</span> DATATYPE<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span> ENCODING<span class="token operator">=</span>TS_2DIFF
 <span class="token operator">&gt;</span> error: encoding TS_2DIFF does <span class="token operator">not</span> support <span class="token keyword">BOOLEAN</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="创建对齐时间序列" tabindex="-1"><a class="header-anchor" href="#创建对齐时间序列"><span>创建对齐时间序列</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">CREATE</span> ALIGNED TIMESERIES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>GPS<span class="token punctuation">(</span>latitude <span class="token keyword">FLOAT</span> encoding<span class="token operator">=</span>PLAIN compressor<span class="token operator">=</span>SNAPPY<span class="token punctuation">,</span> longitude <span class="token keyword">FLOAT</span> encoding<span class="token operator">=</span>PLAIN compressor<span class="token operator">=</span>SNAPPY<span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="删除时间序列" tabindex="-1"><a class="header-anchor" href="#删除时间序列"><span>删除时间序列</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">delete</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span><span class="token keyword">status</span>
 <span class="token keyword">delete</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span>temperature<span class="token punctuation">,</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span>wt02<span class="token punctuation">.</span>hardware
 <span class="token keyword">delete</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span><span class="token operator">*</span>
 <span class="token keyword">drop</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf02<span class="token punctuation">.</span><span class="token operator">*</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="查看时间序列" tabindex="-1"><a class="header-anchor" href="#查看时间序列"><span>查看时间序列</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">SHOW</span> TIMESERIES
 <span class="token keyword">SHOW</span> TIMESERIES <span class="token operator">&lt;</span>Path<span class="token operator">&gt;</span>
 <span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 <span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 <span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">limit</span> <span class="token number">10</span> <span class="token keyword">offset</span> <span class="token number">10</span>
 <span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">where</span> timeseries <span class="token keyword">contains</span> <span class="token string">&#39;wf01.wt&#39;</span>
 <span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">where</span> dataType<span class="token operator">=</span><span class="token keyword">FLOAT</span>
 <span class="token keyword">SHOW</span> LATEST TIMESERIES
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="统计时间序列数量" tabindex="-1"><a class="header-anchor" href="#统计时间序列数量"><span>统计时间序列数量</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span><span class="token keyword">status</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">.</span><span class="token keyword">status</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">WHERE</span> TIMESERIES <span class="token keyword">contains</span> <span class="token string">&#39;sgcc&#39;</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">WHERE</span> DATATYPE <span class="token operator">=</span> INT64
 COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">WHERE</span> TAGS<span class="token punctuation">(</span>unit<span class="token punctuation">)</span> <span class="token keyword">contains</span> <span class="token string">&#39;c&#39;</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">WHERE</span> TAGS<span class="token punctuation">(</span>unit<span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token string">&#39;c&#39;</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">WHERE</span> TIMESERIES <span class="token keyword">contains</span> <span class="token string">&#39;sgcc&#39;</span> <span class="token keyword">group</span> <span class="token keyword">by</span> <span class="token keyword">level</span> <span class="token operator">=</span> <span class="token number">1</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">GROUP</span> <span class="token keyword">BY</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">1</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">GROUP</span> <span class="token keyword">BY</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">2</span>
 COUNT TIMESERIES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span><span class="token operator">*</span> <span class="token keyword">GROUP</span> <span class="token keyword">BY</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">2</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="标签点管理" tabindex="-1"><a class="header-anchor" href="#标签点管理"><span>标签点管理</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1<span class="token punctuation">(</span>temprature<span class="token punctuation">)</span> <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">FLOAT</span><span class="token punctuation">,</span> encoding<span class="token operator">=</span>RLE<span class="token punctuation">,</span> compression<span class="token operator">=</span>SNAPPY tags<span class="token punctuation">(</span>tag1<span class="token operator">=</span>v1<span class="token punctuation">,</span> tag2<span class="token operator">=</span>v2<span class="token punctuation">)</span> attributes<span class="token punctuation">(</span>attr1<span class="token operator">=</span>v1<span class="token punctuation">,</span> attr2<span class="token operator">=</span>v2<span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>重命名标签或属性</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">ALTER</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">RENAME</span> tag1 <span class="token keyword">TO</span> newTag1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>重新设置标签或属性的值</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">ALTER</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">SET</span> newTag1<span class="token operator">=</span>newV1<span class="token punctuation">,</span> attr1<span class="token operator">=</span>newV1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>删除已经存在的标签或属性</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">ALTER</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">DROP</span> tag1<span class="token punctuation">,</span> tag2
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>添加新的标签</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">ALTER</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">ADD</span> TAGS tag3<span class="token operator">=</span>v3<span class="token punctuation">,</span> tag4<span class="token operator">=</span>v4
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>添加新的属性</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">ALTER</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">ADD</span> ATTRIBUTES attr3<span class="token operator">=</span>v3<span class="token punctuation">,</span> attr4<span class="token operator">=</span>v4
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>更新插入别名，标签和属性</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">ALTER</span> timeseries root<span class="token punctuation">.</span>turbine<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 UPSERT ALIAS<span class="token operator">=</span>newAlias TAGS<span class="token punctuation">(</span>tag2<span class="token operator">=</span>newV2<span class="token punctuation">,</span> tag3<span class="token operator">=</span>v3<span class="token punctuation">)</span> ATTRIBUTES<span class="token punctuation">(</span>attr3<span class="token operator">=</span>v3<span class="token punctuation">,</span> attr4<span class="token operator">=</span>v4<span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>使用标签作为过滤条件查询时间序列</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">SHOW</span> TIMESERIES <span class="token punctuation">(</span><span class="token operator">&lt;</span><span class="token identifier"><span class="token punctuation">`</span>PathPattern<span class="token punctuation">`</span></span><span class="token operator">&gt;</span><span class="token punctuation">)</span>? timeseriesWhereClause
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>返回给定路径下的所有满足条件的时间序列信息：</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">where</span> TAGS<span class="token punctuation">(</span>unit<span class="token punctuation">)</span><span class="token operator">=</span><span class="token string">&#39;c&#39;</span>
 <span class="token keyword">show</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">where</span> TAGS<span class="token punctuation">(</span>description<span class="token punctuation">)</span> <span class="token keyword">contains</span> <span class="token string">&#39;test1&#39;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>使用标签作为过滤条件统计时间序列数量</li></ul><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>COUNT TIMESERIES <span class="token punctuation">(</span><span class="token operator">&lt;</span><span class="token identifier"><span class="token punctuation">`</span>PathPattern<span class="token punctuation">`</span></span><span class="token operator">&gt;</span><span class="token punctuation">)</span>? timeseriesWhereClause
 COUNT TIMESERIES <span class="token punctuation">(</span><span class="token operator">&lt;</span><span class="token identifier"><span class="token punctuation">`</span>PathPattern<span class="token punctuation">`</span></span><span class="token operator">&gt;</span><span class="token punctuation">)</span>? timeseriesWhereClause <span class="token keyword">GROUP</span> <span class="token keyword">BY</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token operator">&lt;</span><span class="token keyword">INTEGER</span><span class="token operator">&gt;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>返回给定路径下的所有满足条件的时间序列的数量：</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>count timeseries
 count timeseries root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">where</span> TAGS<span class="token punctuation">(</span>unit<span class="token punctuation">)</span><span class="token operator">=</span><span class="token string">&#39;c&#39;</span>
 count timeseries root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">where</span> TAGS<span class="token punctuation">(</span>unit<span class="token punctuation">)</span><span class="token operator">=</span><span class="token string">&#39;c&#39;</span> <span class="token keyword">group</span> <span class="token keyword">by</span> <span class="token keyword">level</span> <span class="token operator">=</span> <span class="token number">2</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>创建对齐时间序列：</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">create</span> aligned timeseries root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1<span class="token punctuation">(</span>s1 INT32 tags<span class="token punctuation">(</span>tag1<span class="token operator">=</span>v1<span class="token punctuation">,</span> tag2<span class="token operator">=</span>v2<span class="token punctuation">)</span> attributes<span class="token punctuation">(</span>attr1<span class="token operator">=</span>v1<span class="token punctuation">,</span> attr2<span class="token operator">=</span>v2<span class="token punctuation">)</span><span class="token punctuation">,</span> s2 <span class="token keyword">DOUBLE</span> tags<span class="token punctuation">(</span>tag3<span class="token operator">=</span>v3<span class="token punctuation">,</span> tag4<span class="token operator">=</span>v4<span class="token punctuation">)</span> attributes<span class="token punctuation">(</span>attr3<span class="token operator">=</span>v3<span class="token punctuation">,</span> attr4<span class="token operator">=</span>v4<span class="token punctuation">)</span><span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>支持查询：</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">show</span> timeseries <span class="token keyword">where</span> TAGS<span class="token punctuation">(</span>tag1<span class="token punctuation">)</span><span class="token operator">=</span><span class="token string">&#39;v1&#39;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_3、时间序列路径管理" tabindex="-1"><a class="header-anchor" href="#_3、时间序列路径管理"><span>3、时间序列路径管理</span></a></h3><h4 id="查看路径的所有子路径" tabindex="-1"><a class="header-anchor" href="#查看路径的所有子路径"><span>查看路径的所有子路径</span></a></h4><p>SHOW CHILD PATHS pathPattern</p><ul><li>查询 root.ln 的下一层：show child paths root.ln</li><li>查询形如 root.xx.xx.xx 的路径：show child paths root.<em>.</em></li></ul><h4 id="查看路径的所有子节点" tabindex="-1"><a class="header-anchor" href="#查看路径的所有子节点"><span>查看路径的所有子节点</span></a></h4><p>SHOW CHILD NODES pathPattern</p><ul><li>查询 root 的下一层：show child nodes root</li><li>查询 root.ln 的下一层 ：show child nodes root.ln</li></ul><h4 id="查看设备" tabindex="-1"><a class="header-anchor" href="#查看设备"><span>查看设备</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>
 IoTDB<span class="token operator">&gt;</span> <span class="token keyword">show</span> devices

 IoTDB<span class="token operator">&gt;</span> <span class="token keyword">show</span> devices root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h5 id="查看设备及其-database-信息" tabindex="-1"><a class="header-anchor" href="#查看设备及其-database-信息"><span>查看设备及其 database 信息</span></a></h5><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>
 IoTDB<span class="token operator">&gt;</span> <span class="token keyword">show</span> devices <span class="token keyword">with</span> <span class="token keyword">database</span>

 IoTDB<span class="token operator">&gt;</span> <span class="token keyword">show</span> devices root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">with</span> <span class="token keyword">database</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="统计节点数" tabindex="-1"><a class="header-anchor" href="#统计节点数"><span>统计节点数</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>
 IoTDB <span class="token operator">&gt;</span> COUNT NODES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">2</span>

 IoTDB <span class="token operator">&gt;</span> COUNT NODES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">2</span>

 IoTDB <span class="token operator">&gt;</span> COUNT NODES root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span><span class="token operator">*</span> <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">3</span>

 IoTDB <span class="token operator">&gt;</span> COUNT NODES root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span><span class="token punctuation">.</span>temperature <span class="token keyword">LEVEL</span><span class="token operator">=</span><span class="token number">3</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="统计设备数量" tabindex="-1"><a class="header-anchor" href="#统计设备数量"><span>统计设备数量</span></a></h4><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code>IoTDB<span class="token operator">&gt;</span> <span class="token keyword">show</span> devices

 IoTDB<span class="token operator">&gt;</span> count devices

 IoTDB<span class="token operator">&gt;</span> count devices root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span><span class="token operator">*</span><span class="token operator">*</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_4、设备模板管理" tabindex="-1"><a class="header-anchor" href="#_4、设备模板管理"><span>4、设备模板管理</span></a></h3><figure><img src="https://alioss.timecho.com/docs/img/模板.png" alt="img" tabindex="0" loading="lazy"><figcaption>img</figcaption></figure><p>Create template(s1 int, s2 float) on <a href="http://root.sg" target="_blank" rel="noopener noreferrer">root.sg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>Create device root.sg.d1</p><figure><img src="https://alioss.timecho.com/docs/img/模板流程.png" alt="img" tabindex="0" loading="lazy"><figcaption>img</figcaption></figure><h4 id="创建元数据模板" tabindex="-1"><a class="header-anchor" href="#创建元数据模板"><span>创建元数据模板</span></a></h4><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>CREATE SCHEMA TEMPLATE &lt;templateName&gt; ALIGNED? &#39;(&#39; &lt;measurementId&gt; &lt;attributeClauses&gt; [&#39;,&#39; &lt;measurementId&gt; &lt;attributeClauses&gt;]+ &#39;)&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>创建包含两个非对齐序列的元数据模板</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 IoTDB&gt; create schema template t1 (temperature FLOAT encoding=RLE, status BOOLEAN encoding=PLAIN compression=SNAPPY)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>创建包含一组对齐序列的元数据模板</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; create schema template t2 aligned (lat FLOAT encoding=Gorilla, lon FLOAT encoding=Gorilla)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="挂载元数据模板" tabindex="-1"><a class="header-anchor" href="#挂载元数据模板"><span>挂载元数据模板</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; set SCHEMA TEMPLATE t1 to root.sg1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="激活元数据模板" tabindex="-1"><a class="header-anchor" href="#激活元数据模板"><span>激活元数据模板</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; create timeseries using SCHEMA TEMPLATE on root.sg1.d1

 IoTDB&gt; set SCHEMA TEMPLATE t1 to root.sg1.d1

 IoTDB&gt; set SCHEMA TEMPLATE t2 to root.sg1.d2

 IoTDB&gt; create timeseries using schema template on root.sg1.d1

 IoTDB&gt; create timeseries using schema template on root.sg1.d2
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="查看元数据模板" tabindex="-1"><a class="header-anchor" href="#查看元数据模板"><span>查看元数据模板</span></a></h4><p>IoTDB&gt; show schema templates</p><ul><li>查看某个元数据模板下的物理量</li></ul><p>IoTDB&gt; show nodes in schema template t1</p><ul><li>查看挂载了某个元数据模板的路径</li></ul><p>IoTDB&gt; show paths set schema template t1</p><ul><li>查看使用了某个元数据模板的路径（即模板在该路径上已激活，序列已创建）</li></ul><p>IoTDB&gt; show paths using schema template t1</p><p>IoTDB&gt; show devices using schema template t1</p><h4 id="解除元数据模板" tabindex="-1"><a class="header-anchor" href="#解除元数据模板"><span>解除元数据模板</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; delete timeseries of schema template t1 from root.sg1.d1

 IoTDB&gt; deactivate schema template t1 from root.sg1.d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>批量处理</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; delete timeseries of schema template t1 from root.sg1.*, root.sg2.*

 IoTDB&gt; deactivate schema template t1 from root.sg1.*, root.sg2.*
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="卸载元数据模板" tabindex="-1"><a class="header-anchor" href="#卸载元数据模板"><span>卸载元数据模板</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; unset schema template t1 from root.sg1.d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="删除元数据模板" tabindex="-1"><a class="header-anchor" href="#删除元数据模板"><span>删除元数据模板</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; drop schema template t1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_5、数据存活时间管理" tabindex="-1"><a class="header-anchor" href="#_5、数据存活时间管理"><span>5、数据存活时间管理</span></a></h3><h4 id="设置-ttl" tabindex="-1"><a class="header-anchor" href="#设置-ttl"><span>设置 TTL</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; set ttl to root.ln 3600000

 IoTDB&gt; set ttl to root.sgcc.** 3600000

 IoTDB&gt; set ttl to root.** 3600000
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="取消-ttl" tabindex="-1"><a class="header-anchor" href="#取消-ttl"><span>取消 TTL</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; unset ttl to root.ln

 IoTDB&gt; unset ttl to root.sgcc.**

 IoTDB&gt; unset ttl to root.**
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="显示-ttl" tabindex="-1"><a class="header-anchor" href="#显示-ttl"><span>显示 TTL</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; SHOW ALL TTL

 IoTDB&gt; SHOW TTL ON StorageGroupNames
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="写入数据" tabindex="-1"><a class="header-anchor" href="#写入数据"><span>写入数据</span></a></h2><h3 id="_1、写入单列数据" tabindex="-1"><a class="header-anchor" href="#_1、写入单列数据"><span>1、写入单列数据</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB &gt; insert into root.ln.wf02.wt02(timestamp,status) values(1,true)

 IoTDB &gt; insert into root.ln.wf02.wt02(timestamp,hardware) values(1, &#39;v1&#39;),(2, &#39;v1&#39;)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_2、写入多列数据" tabindex="-1"><a class="header-anchor" href="#_2、写入多列数据"><span>2、写入多列数据</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB &gt; insert into root.ln.wf02.wt02(timestamp, status, hardware) values (2, false, &#39;v2&#39;)

 IoTDB &gt; insert into root.ln.wf02.wt02(timestamp, status, hardware) VALUES (3, false, &#39;v3&#39;),(4, true, &#39;v4&#39;)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_3、使用服务器时间戳" tabindex="-1"><a class="header-anchor" href="#_3、使用服务器时间戳"><span>3、使用服务器时间戳</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB &gt; insert into root.ln.wf02.wt02(status, hardware) values (false, &#39;v2&#39;)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_4、写入对齐时间序列数据" tabindex="-1"><a class="header-anchor" href="#_4、写入对齐时间序列数据"><span>4、写入对齐时间序列数据</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB &gt; create aligned timeseries root.sg1.d1(s1 INT32, s2 DOUBLE)

 IoTDB &gt; insert into root.sg1.d1(timestamp, s1, s2) aligned values(1, 1, 1)

 IoTDB &gt; insert into root.sg1.d1(timestamp, s1, s2) aligned values(2, 2, 2), (3, 3, 3)

 IoTDB &gt; select * from root.sg1.d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_5、加载-tsfile-文件数据" tabindex="-1"><a class="header-anchor" href="#_5、加载-tsfile-文件数据"><span>5、加载 TsFile 文件数据</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>load &#39;&lt;path/dir&gt;&#39; [sglevel=int][verify=true/false][onSuccess=delete/none]
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="通过指定文件路径-绝对路径-加载单-tsfile-文件" tabindex="-1"><a class="header-anchor" href="#通过指定文件路径-绝对路径-加载单-tsfile-文件"><span>通过指定文件路径(绝对路径)加载单 tsfile 文件</span></a></h4><ul><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39;</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; verify=true</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; verify=false</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; sglevel=1</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; onSuccess=delete</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; verify=true sglevel=1</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; verify=false sglevel=1</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; verify=true onSuccess=none</code></li><li><code>load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39; verify=false sglevel=1 onSuccess=delete</code></li></ul><h4 id="通过指定文件夹路径-绝对路径-批量加载文件" tabindex="-1"><a class="header-anchor" href="#通过指定文件夹路径-绝对路径-批量加载文件"><span>通过指定文件夹路径(绝对路径)批量加载文件</span></a></h4><ul><li><code>load &#39;/Users/Desktop/data&#39;</code></li><li><code>load &#39;/Users/Desktop/data&#39; verify=false</code></li><li><code>load &#39;/Users/Desktop/data&#39; verify=true</code></li><li><code>load &#39;/Users/Desktop/data&#39; verify=true sglevel=1</code></li><li><code>load &#39;/Users/Desktop/data&#39; verify=false sglevel=1 onSuccess=delete</code></li></ul><h2 id="删除数据" tabindex="-1"><a class="header-anchor" href="#删除数据"><span>删除数据</span></a></h2><h3 id="_1、删除单列数据" tabindex="-1"><a class="header-anchor" href="#_1、删除单列数据"><span>1、删除单列数据</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>delete from root.ln.wf02.wt02.status where time&lt;=2017-11-01T16:26:00;

 delete from root.ln.wf02.wt02.status where time&gt;=2017-01-01T00:00:00 and time&lt;=2017-11-01T16:26:00;

 delete from root.ln.wf02.wt02.status where time &lt; 10

 delete from root.ln.wf02.wt02.status where time &lt;= 10

 delete from root.ln.wf02.wt02.status where time &lt; 20 and time &gt; 10

 delete from root.ln.wf02.wt02.status where time &lt;= 20 and time &gt;= 10

 delete from root.ln.wf02.wt02.status where time &gt; 20

 delete from root.ln.wf02.wt02.status where time &gt;= 20

 delete from root.ln.wf02.wt02.status where time = 20
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>出错：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>delete from root.ln.wf02.wt02.status where time &gt; 4 or time &lt; 0

 Msg: 303: Check metadata error: For delete statement, where clause can only contain atomic

 expressions like : time &gt; XXX, time &lt;= XXX, or two atomic expressions connected by &#39;AND&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>删除时间序列中的所有数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>delete from root.ln.wf02.wt02.status
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_2、删除多列数据" tabindex="-1"><a class="header-anchor" href="#_2、删除多列数据"><span>2、删除多列数据</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>delete from root.ln.wf02.wt02.* where time &lt;= 2017-11-01T16:26:00;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>声明式的编程方式：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; delete from root.ln.wf03.wt02.status where time &lt; now()

 Msg: The statement is executed successfully.
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="数据查询" tabindex="-1"><a class="header-anchor" href="#数据查询"><span>数据查询</span></a></h2><h3 id="_1、基础查询" tabindex="-1"><a class="header-anchor" href="#_1、基础查询"><span>1、基础查询</span></a></h3><h4 id="时间过滤查询" tabindex="-1"><a class="header-anchor" href="#时间过滤查询"><span>时间过滤查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature from root.ln.wf01.wt01 where time &lt; 2017-11-01T00:08:00.000
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="根据一个时间区间选择多列数据" tabindex="-1"><a class="header-anchor" href="#根据一个时间区间选择多列数据"><span>根据一个时间区间选择多列数据</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select status, temperature from root.ln.wf01.wt01 where time &gt; 2017-11-01T00:05:00.000 and time &lt; 2017-11-01T00:12:00.000;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="按照多个时间区间选择同一设备的多列数据" tabindex="-1"><a class="header-anchor" href="#按照多个时间区间选择同一设备的多列数据"><span>按照多个时间区间选择同一设备的多列数据</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select status, temperature from root.ln.wf01.wt01 where (time &gt; 2017-11-01T00:05:00.000 and time &lt; 2017-11-01T00:12:00.000) or (time &gt;= 2017-11-01T16:35:00.000 and time &lt;= 2017-11-01T16:37:00.000);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="按照多个时间区间选择不同设备的多列数据" tabindex="-1"><a class="header-anchor" href="#按照多个时间区间选择不同设备的多列数据"><span>按照多个时间区间选择不同设备的多列数据</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select wf01.wt01.status, wf02.wt02.hardware from root.ln where (time &gt; 2017-11-01T00:05:00.000 and time &lt; 2017-11-01T00:12:00.000) or (time &gt;= 2017-11-01T16:35:00.000 and time &lt;= 2017-11-01T16:37:00.000);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="根据时间降序返回结果集" tabindex="-1"><a class="header-anchor" href="#根据时间降序返回结果集"><span>根据时间降序返回结果集</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.** where time &gt; 1 order by time desc limit 10;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_2、选择表达式" tabindex="-1"><a class="header-anchor" href="#_2、选择表达式"><span>2、选择表达式</span></a></h3><h4 id="使用别名" tabindex="-1"><a class="header-anchor" href="#使用别名"><span>使用别名</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select s1 as temperature, s2 as speed from root.ln.wf01.wt01;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="运算符" tabindex="-1"><a class="header-anchor" href="#运算符"><span>运算符</span></a></h4><h4 id="函数" tabindex="-1"><a class="header-anchor" href="#函数"><span>函数</span></a></h4><p>不支持：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select s1, count(s1) from root.sg.d1;

 select sin(s1), count(s1) from root.sg.d1;

 select s1, count(s1) from root.sg.d1 group by ([10,100),10ms);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h5 id="时间序列查询嵌套表达式" tabindex="-1"><a class="header-anchor" href="#时间序列查询嵌套表达式"><span>时间序列查询嵌套表达式</span></a></h5><p>示例 1：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select a,

        b,

        ((a + 1) * 2 - 1) % 2 + 1.5,

        sin(a + sin(a + sin(b))),

        -(a + b) * (sin(a + b) * sin(a + b) + cos(a + b) * cos(a + b)) + 1

 from root.sg1;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>示例 2：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select (a + b) * 2 + sin(a) from root.sg
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>示例 3：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select (a + *) / 2  from root.sg1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>示例 4：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select (a + b) * 3 from root.sg, root.ln
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h5 id="聚合查询嵌套表达式" tabindex="-1"><a class="header-anchor" href="#聚合查询嵌套表达式"><span>聚合查询嵌套表达式</span></a></h5><p>示例 1：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select avg(temperature),

        sin(avg(temperature)),

        avg(temperature) + 1,

        -sum(hardware),

        avg(temperature) + sum(hardware)

 from root.ln.wf01.wt01;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>示例 2：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select avg(*),

            (avg(*) + 1) * 3 / 2 -1

 from root.sg1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>示例 3：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select avg(temperature),

        sin(avg(temperature)),

        avg(temperature) + 1,

        -sum(hardware),

        avg(temperature) + sum(hardware) as custom_sum

 from root.ln.wf01.wt01

 GROUP BY([10, 90), 10ms);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="最新点查询" tabindex="-1"><a class="header-anchor" href="#最新点查询"><span>最新点查询</span></a></h4><p>SQL 语法：</p><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>select last &lt;Path&gt; [COMMA &lt;Path&gt;]* from &lt; PrefixPath &gt; [COMMA &lt; PrefixPath &gt;]* &lt;whereClause&gt; [ORDER BY TIMESERIES (DESC | ASC)?]
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询 root.ln.wf01.wt01.status 的最新数据点</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select last status from root.ln.wf01.wt01
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询 root.ln.wf01.wt01 下 status，temperature 时间戳大于等于 2017-11-07T23:50:00 的最新数据点</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select last status, temperature from root.ln.wf01.wt01 where time &gt;= 2017-11-07T23:50:00
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询 root.ln.wf01.wt01 下所有序列的最新数据点，并按照序列名降序排列</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select last * from root.ln.wf01.wt01 order by timeseries desc;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_3、查询过滤条件" tabindex="-1"><a class="header-anchor" href="#_3、查询过滤条件"><span>3、查询过滤条件</span></a></h3><h4 id="时间过滤条件" tabindex="-1"><a class="header-anchor" href="#时间过滤条件"><span>时间过滤条件</span></a></h4><p>选择时间戳大于 2022-01-01T00:05:00.000 的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select s1 from root.sg1.d1 where time &gt; 2022-01-01T00:05:00.000;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择时间戳等于 2022-01-01T00:05:00.000 的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select s1 from root.sg1.d1 where time = 2022-01-01T00:05:00.000;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择时间区间 [2017-11-01T00:05:00.000, 2017-11-01T00:12:00.000) 内的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select s1 from root.sg1.d1 where time &gt;= 2022-01-01T00:05:00.000 and time &lt; 2017-11-01T00:12:00.000;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="值过滤条件" tabindex="-1"><a class="header-anchor" href="#值过滤条件"><span>值过滤条件</span></a></h4><p>选择值大于 36.5 的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature from root.sg1.d1 where temperature &gt; 36.5;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择值等于 true 的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select status from root.sg1.d1 where status = true;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择区间 [36.5,40] 内或之外的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature from root.sg1.d1 where temperature between 36.5 and 40;

 select temperature from root.sg1.d1 where temperature not between 36.5 and 40;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>选择值在特定范围内的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select code from root.sg1.d1 where code in (&#39;200&#39;, &#39;300&#39;, &#39;400&#39;, &#39;500&#39;);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择值在特定范围外的数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select code from root.sg1.d1 where code not in (&#39;200&#39;, &#39;300&#39;, &#39;400&#39;, &#39;500&#39;);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择值为空的数据:</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select code from root.sg1.d1 where temperature is null;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>选择值为非空的数据:</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select code from root.sg1.d1 where temperature is not null;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="模糊查询" tabindex="-1"><a class="header-anchor" href="#模糊查询"><span>模糊查询</span></a></h4><p>查询 <code>root.sg.d1</code> 下 <code>value</code> 含有<code>&#39;cc&#39;</code>的数据</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select * from root.sg.d1 where value like &#39;%cc%&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询 <code>root.sg.d1</code> 下 <code>value</code> 中间为 <code>&#39;b&#39;</code>、前后为任意单个字符的数据</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select * from root.sg.device where value like &#39;_b_&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询 root.sg.d1 下 value 值为26个英文字符组成的字符串</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select * from root.sg.d1 where value regexp &#39;^[A-Za-z]+$&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询 root.sg.d1 下 value 值为26个小写英文字符组成的字符串且时间大于100的</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select * from root.sg.d1 where value regexp &#39;^[a-z]+$&#39; and time &gt; 100
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_4、分段分组聚合" tabindex="-1"><a class="header-anchor" href="#_4、分段分组聚合"><span>4、分段分组聚合</span></a></h3><h4 id="未指定滑动步长的时间区间分组聚合查询" tabindex="-1"><a class="header-anchor" href="#未指定滑动步长的时间区间分组聚合查询"><span>未指定滑动步长的时间区间分组聚合查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status), max_value(temperature) from root.ln.wf01.wt01 group by ([2017-11-01T00:00:00, 2017-11-07T23:00:00),1d);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="指定滑动步长的时间区间分组聚合查询" tabindex="-1"><a class="header-anchor" href="#指定滑动步长的时间区间分组聚合查询"><span>指定滑动步长的时间区间分组聚合查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status), max_value(temperature) from root.ln.wf01.wt01 group by ([2017-11-01 00:00:00, 2017-11-07 23:00:00), 3h, 1d);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>滑动步长可以小于聚合窗口</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status), max_value(temperature) from root.ln.wf01.wt01 group by ([2017-11-01 00:00:00, 2017-11-01 10:00:00), 4h, 2h);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="按照自然月份的时间区间分组聚合查询" tabindex="-1"><a class="header-anchor" href="#按照自然月份的时间区间分组聚合查询"><span>按照自然月份的时间区间分组聚合查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.ln.wf01.wt01 where time &gt; 2017-11-01T01:00:00 group by([2017-11-01T00:00:00, 2019-11-07T23:00:00), 1mo, 2mo);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>每个时间间隔窗口内都有数据</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.ln.wf01.wt01 group by([2017-10-31T00:00:00, 2019-11-07T23:00:00), 1mo, 2mo);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="左开右闭区间" tabindex="-1"><a class="header-anchor" href="#左开右闭区间"><span>左开右闭区间</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.ln.wf01.wt01 group by ((2017-11-01T00:00:00, 2017-11-07T23:00:00],1d);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="与分组聚合混合使用" tabindex="-1"><a class="header-anchor" href="#与分组聚合混合使用"><span>与分组聚合混合使用</span></a></h4><p>统计降采样后的数据点个数</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.ln.wf01.wt01 group by ((2017-11-01T00:00:00, 2017-11-07T23:00:00],1d), level=1;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>加上滑动 Step 的降采样后的结果也可以汇总</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.ln.wf01.wt01 group by ([2017-11-01 00:00:00, 2017-11-07 23:00:00), 3h, 1d), level=1;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="路径层级分组聚合" tabindex="-1"><a class="header-anchor" href="#路径层级分组聚合"><span>路径层级分组聚合</span></a></h4><p>统计不同 database 下 status 序列的数据点个数</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.** group by level = 1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>统计不同设备下 status 序列的数据点个数</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.** group by level = 3
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>统计不同 database 下的不同设备中 status 序列的数据点个数</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status) from root.** group by level = 1, 3
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询所有序列下温度传感器 temperature 的最大值</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select max_value(temperature) from root.** group by level = 0
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询某一层级下所有传感器拥有的总数据点数</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(*) from root.ln.** group by level = 2
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="标签分组聚合" tabindex="-1"><a class="header-anchor" href="#标签分组聚合"><span>标签分组聚合</span></a></h4><h5 id="单标签聚合查询" tabindex="-1"><a class="header-anchor" href="#单标签聚合查询"><span>单标签聚合查询</span></a></h5><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT AVG(temperature) FROM root.factory1.** GROUP BY TAGS(city);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h5 id="多标签聚合查询" tabindex="-1"><a class="header-anchor" href="#多标签聚合查询"><span>多标签聚合查询</span></a></h5><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT avg(temperature) FROM root.factory1.** GROUP BY TAGS(city, workshop);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h5 id="基于时间区间的标签聚合查询" tabindex="-1"><a class="header-anchor" href="#基于时间区间的标签聚合查询"><span>基于时间区间的标签聚合查询</span></a></h5><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT AVG(temperature) FROM root.factory1.** GROUP BY ([1000, 10000), 5s), TAGS(city, workshop);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="差值分段聚合" tabindex="-1"><a class="header-anchor" href="#差值分段聚合"><span>差值分段聚合</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>group by variation(controlExpression[,delta][,ignoreNull=true/false])
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h5 id="delta-0时的等值事件分段" tabindex="-1"><a class="header-anchor" href="#delta-0时的等值事件分段"><span>delta=0时的等值事件分段</span></a></h5><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select __endTime, avg(s1), count(s2), sum(s3) from root.sg.d group by variation(s6)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>指定ignoreNull为false</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select __endTime, avg(s1), count(s2), sum(s3) from root.sg.d group by variation(s6, ignoreNull=false)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h5 id="delta-0时的差值事件分段" tabindex="-1"><a class="header-anchor" href="#delta-0时的差值事件分段"><span>delta!=0时的差值事件分段</span></a></h5><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select __endTime, avg(s1), count(s2), sum(s3) from root.sg.d group by variation(s6, 4)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="条件分段聚合" tabindex="-1"><a class="header-anchor" href="#条件分段聚合"><span>条件分段聚合</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>group by condition(predict,[keep&gt;/&gt;=/=/&lt;=/&lt;]threshold,[,ignoreNull=true/false])
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>查询至少连续两行以上的charging_status=1的数据</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select max_time(charging_status),count(vehicle_status),last_value(soc) from root.** group by condition(charging_status=1,KEEP&gt;=2,ignoreNull=true)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>当设置<code>ignoreNull</code>为false时，遇到null值为将其视为一个不满足条件的行，得到结果原先的分组被含null的行拆分</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select max_time(charging_status),count(vehicle_status),last_value(soc) from root.** group by condition(charging_status=1,KEEP&gt;=2,ignoreNull=false)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="会话分段聚合" tabindex="-1"><a class="header-anchor" href="#会话分段聚合"><span>会话分段聚合</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>group by session(timeInterval)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>按照不同的时间单位设定时间间隔</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select __endTime,count(*) from root.** group by session(1d)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>和<code>HAVING</code>、<code>ALIGN BY DEVICE</code>共同使用</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select __endTime,sum(hardware) from root.ln.wf02.wt01 group by session(50s) having sum(hardware)&gt;0 align by device
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="点数分段聚合" tabindex="-1"><a class="header-anchor" href="#点数分段聚合"><span>点数分段聚合</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>group by count(controlExpression, size[,ignoreNull=true/false])

 select count(charging_stauts), first_value(soc) from root.sg group by count(charging_status,5)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>当使用ignoreNull将null值也考虑进来</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(charging_stauts), first_value(soc) from root.sg group by count(charging_status,5,ignoreNull=false)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_5、聚合结果过滤" tabindex="-1"><a class="header-anchor" href="#_5、聚合结果过滤"><span>5、聚合结果过滤</span></a></h3><p>不正确的：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(s1) from root.** group by ([1,3),1ms) having sum(s1) &gt; s1

 select count(s1) from root.** group by ([1,3),1ms) having s1 &gt; 1

 select count(s1) from root.** group by ([1,3),1ms), level=1 having sum(d1.s1) &gt; 1

 select count(d1.s1) from root.** group by ([1,3),1ms), level=1 having sum(s1) &gt; 1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL 示例：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code> select count(s1) from root.** group by ([1,11),2ms), level=1 having count(s2) &gt; 2;

  select count(s1), count(s2) from root.** group by ([1,11),2ms) having count(s2) &gt; 1 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_6、结果集补空值" tabindex="-1"><a class="header-anchor" href="#_6、结果集补空值"><span>6、结果集补空值</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>FILL &#39;(&#39; PREVIOUS | LINEAR | constant &#39;)&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="previous-填充" tabindex="-1"><a class="header-anchor" href="#previous-填充"><span><code>PREVIOUS</code> 填充</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature, status from root.sgcc.wf03.wt01 where time &gt;= 2017-11-01T16:37:00.000 and time &lt;= 2017-11-01T16:40:00.000 fill(previous);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="linear-填充" tabindex="-1"><a class="header-anchor" href="#linear-填充"><span><code>LINEAR</code> 填充</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature, status from root.sgcc.wf03.wt01 where time &gt;= 2017-11-01T16:37:00.000 and time &lt;= 2017-11-01T16:40:00.000 fill(linear);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="常量填充" tabindex="-1"><a class="header-anchor" href="#常量填充"><span>常量填充</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature, status from root.sgcc.wf03.wt01 where time &gt;= 2017-11-01T16:37:00.000 and time &lt;= 2017-11-01T16:40:00.000 fill(2.0);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>使用 <code>BOOLEAN</code> 类型的常量填充</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select temperature, status from root.sgcc.wf03.wt01 where time &gt;= 2017-11-01T16:37:00.000 and time &lt;= 2017-11-01T16:40:00.000 fill(true);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_7、查询结果分页" tabindex="-1"><a class="header-anchor" href="#_7、查询结果分页"><span>7、查询结果分页</span></a></h3><h4 id="按行分页" tabindex="-1"><a class="header-anchor" href="#按行分页"><span>按行分页</span></a></h4><p>基本的 <code>LIMIT</code> 子句</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select status, temperature from root.ln.wf01.wt01 limit 10
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>带 <code>OFFSET</code> 的 <code>LIMIT</code> 子句</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select status, temperature from root.ln.wf01.wt01 limit 5 offset 3
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><code>LIMIT</code> 子句与 <code>WHERE</code> 子句结合</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select status,temperature from root.ln.wf01.wt01 where time &gt; 2017-11-01T00:05:00.000 and time&lt; 2017-11-01T00:12:00.000 limit 5 offset 3
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><code>LIMIT</code> 子句与 <code>GROUP BY</code> 子句组合</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(status), max_value(temperature) from root.ln.wf01.wt01 group by ([2017-11-01T00:00:00, 2017-11-07T23:00:00),1d) limit 4 offset 3
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="按列分页" tabindex="-1"><a class="header-anchor" href="#按列分页"><span>按列分页</span></a></h4><p>基本的 <code>SLIMIT</code> 子句</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.wf01.wt01 where time &gt; 2017-11-01T00:05:00.000 and time &lt; 2017-11-01T00:12:00.000 slimit 1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>带 <code>SOFFSET</code> 的 <code>SLIMIT</code> 子句</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.wf01.wt01 where time &gt; 2017-11-01T00:05:00.000 and time &lt; 2017-11-01T00:12:00.000 slimit 1 soffset 1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><code>SLIMIT</code> 子句与 <code>GROUP BY</code> 子句结合</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select max_value(*) from root.ln.wf01.wt01 group by ([2017-11-01T00:00:00, 2017-11-07T23:00:00),1d) slimit 1 soffset 1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><code>SLIMIT</code> 子句与 <code>LIMIT</code> 子句结合</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.wf01.wt01 limit 10 offset 100 slimit 2 soffset 0
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_8、排序" tabindex="-1"><a class="header-anchor" href="#_8、排序"><span>8、排序</span></a></h3><p>时间对齐模式下的排序</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.** where time &lt;= 2017-11-01T00:01:00 order by time desc;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>设备对齐模式下的排序</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.** where time &lt;= 2017-11-01T00:01:00 order by device desc,time asc align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>在时间戳相等时按照设备名排序</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.** where time &lt;= 2017-11-01T00:01:00 order by time asc,device desc align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>没有显式指定时</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.** where time &lt;= 2017-11-01T00:01:00 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>对聚合后的结果进行排序</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select count(*) from root.ln.** group by ((2017-11-01T00:00:00.000+08:00,2017-11-01T00:03:00.000+08:00],1m) order by device asc,time asc align by device
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_9、查询对齐模式" tabindex="-1"><a class="header-anchor" href="#_9、查询对齐模式"><span>9、查询对齐模式</span></a></h3><h4 id="按设备对齐" tabindex="-1"><a class="header-anchor" href="#按设备对齐"><span>按设备对齐</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * from root.ln.** where time &lt;= 2017-11-01T00:01:00 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_10、查询写回-select-into" tabindex="-1"><a class="header-anchor" href="#_10、查询写回-select-into"><span>10、查询写回（SELECT INTO）</span></a></h3><h4 id="整体描述" tabindex="-1"><a class="header-anchor" href="#整体描述"><span>整体描述</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>selectIntoStatement

     : SELECT

         resultColumn [, resultColumn] ...

         INTO intoItem [, intoItem] ...

         FROM prefixPath [, prefixPath] ...

         [WHERE whereCondition]

         [GROUP BY groupByTimeClause, groupByLevelClause]

         [FILL {PREVIOUS | LINEAR | constant}]

         [LIMIT rowLimit OFFSET rowOffset]

         [ALIGN BY DEVICE]

     ;


 intoItem

     : [ALIGNED] intoDevicePath &#39;(&#39; intoMeasurementName [&#39;,&#39; intoMeasurementName]* &#39;)&#39;

     ;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>按时间对齐，将 <code>root.sg</code> database 下四条序列的查询结果写入到 <code>root.sg_copy</code> database 下指定的四条序列中</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select s1, s2 into root.sg_copy.d1(t1), root.sg_copy.d2(t1, t2), root.sg_copy.d1(t2) from root.sg.d1, root.sg.d2;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>按时间对齐，将聚合查询的结果存储到指定序列中</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select count(s1 + s2), last_value(s2) into root.agg.count(s1_add_s2), root.agg.last_value(s2) from root.sg.d1 group by ([0, 100), 10ms);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>按设备对齐</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select s1, s2 into root.sg_copy.d1(t1, t2), root.sg_copy.d2(t1, t2) from root.sg.d1, root.sg.d2 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>按设备对齐，将表达式计算的结果存储到指定序列中</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; select s1 + s2 into root.expr.add(d1s1_d1s2), root.expr.add(d2s1_d2s2) from root.sg.d1, root.sg.d2 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="使用变量占位符" tabindex="-1"><a class="header-anchor" href="#使用变量占位符"><span>使用变量占位符</span></a></h4><h5 id="按时间对齐-默认" tabindex="-1"><a class="header-anchor" href="#按时间对齐-默认"><span>按时间对齐（默认）</span></a></h5><h6 id="_1-目标设备不使用变量占位符-目标物理量列表使用变量占位符" tabindex="-1"><a class="header-anchor" href="#_1-目标设备不使用变量占位符-目标物理量列表使用变量占位符"><span>（1）目标设备不使用变量占位符 &amp; 目标物理量列表使用变量占位符</span></a></h6><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 select s1, s2

 into root.sg_copy.d1(::), root.sg_copy.d2(s1), root.sg_copy.d1(${3}), root.sg_copy.d2(::)

 from root.sg.d1, root.sg.d2;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>该语句等价于：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 select s1, s2

 into root.sg_copy.d1(s1), root.sg_copy.d2(s1), root.sg_copy.d1(s2), root.sg_copy.d2(s2)

 from root.sg.d1, root.sg.d2;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h6 id="_2-目标设备使用变量占位符-目标物理量列表不使用变量占位符" tabindex="-1"><a class="header-anchor" href="#_2-目标设备使用变量占位符-目标物理量列表不使用变量占位符"><span>（2）目标设备使用变量占位符 &amp; 目标物理量列表不使用变量占位符</span></a></h6><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select d1.s1, d1.s2, d2.s3, d3.s4

 into ::(s1_1, s2_2), root.sg.d2_2(s3_3), root.${2}_copy.::(s4)

 from root.sg;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h6 id="_3-目标设备使用变量占位符-目标物理量列表使用变量占位符" tabindex="-1"><a class="header-anchor" href="#_3-目标设备使用变量占位符-目标物理量列表使用变量占位符"><span>（3）目标设备使用变量占位符 &amp; 目标物理量列表使用变量占位符</span></a></h6><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>select * into root.sg_bk.::(::) from root.sg.**;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h5 id="按设备对齐-使用-align-by-device" tabindex="-1"><a class="header-anchor" href="#按设备对齐-使用-align-by-device"><span>按设备对齐（使用 <code>ALIGN BY DEVICE</code>）</span></a></h5><h6 id="_1-目标设备不使用变量占位符-目标物理量列表使用变量占位符-1" tabindex="-1"><a class="header-anchor" href="#_1-目标设备不使用变量占位符-目标物理量列表使用变量占位符-1"><span>（1）目标设备不使用变量占位符 &amp; 目标物理量列表使用变量占位符</span></a></h6><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 select s1, s2, s3, s4

 into root.backup_sg.d1(s1, s2, s3, s4), root.backup_sg.d2(::), root.sg.d3(backup_${4})

 from root.sg.d1, root.sg.d2, root.sg.d3

 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h6 id="_2-目标设备使用变量占位符-目标物理量列表不使用变量占位符-1" tabindex="-1"><a class="header-anchor" href="#_2-目标设备使用变量占位符-目标物理量列表不使用变量占位符-1"><span>（2）目标设备使用变量占位符 &amp; 目标物理量列表不使用变量占位符</span></a></h6><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 select avg(s1), sum(s2) + sum(s3), count(s4)

 into root.agg_${2}.::(avg_s1, sum_s2_add_s3, count_s4)

 from root.**

 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h6 id="_3-目标设备使用变量占位符-目标物理量列表使用变量占位符-1" tabindex="-1"><a class="header-anchor" href="#_3-目标设备使用变量占位符-目标物理量列表使用变量占位符-1"><span>（3）目标设备使用变量占位符 &amp; 目标物理量列表使用变量占位符</span></a></h6><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 select * into ::(backup_${4}) from root.sg.** align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="指定目标序列为对齐序列" tabindex="-1"><a class="header-anchor" href="#指定目标序列为对齐序列"><span>指定目标序列为对齐序列</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>
 select s1, s2 into root.sg_copy.d1(t1, t2), aligned root.sg_copy.d2(t1, t2) from root.sg.d1, root.sg.d2 align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="运算符-1" tabindex="-1"><a class="header-anchor" href="#运算符-1"><span>运算符</span></a></h2><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Operator-and-Expression</a></p><h3 id="算数运算符" tabindex="-1"><a class="header-anchor" href="#算数运算符"><span>算数运算符</span></a></h3><p>更多见文档 <a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Arithmetic Operators and Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> <span class="token operator">-</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> <span class="token operator">+</span> s2<span class="token punctuation">,</span> s1 <span class="token operator">+</span> s2<span class="token punctuation">,</span> s1 <span class="token operator">-</span> s2<span class="token punctuation">,</span> s1 <span class="token operator">*</span> s2<span class="token punctuation">,</span> s1 <span class="token operator">/</span> s2<span class="token punctuation">,</span> s1 <span class="token operator">%</span> s2 <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="比较运算符" tabindex="-1"><a class="header-anchor" href="#比较运算符"><span>比较运算符</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Comparison Operators and Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># Basic comparison operators</span>
 <span class="token keyword">select</span> a<span class="token punctuation">,</span> b<span class="token punctuation">,</span> a <span class="token operator">&gt;</span> <span class="token number">10</span><span class="token punctuation">,</span> a <span class="token operator">&lt;=</span> b<span class="token punctuation">,</span> <span class="token operator">!</span><span class="token punctuation">(</span>a <span class="token operator">&lt;=</span> b<span class="token punctuation">)</span><span class="token punctuation">,</span> a <span class="token operator">&gt;</span> <span class="token number">10</span> <span class="token operator">&amp;&amp;</span> a <span class="token operator">&gt;</span> b <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>

 <span class="token comment"># `BETWEEN ... AND ...` operator</span>
 <span class="token keyword">select</span> temperature <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">between</span> <span class="token number">36.5</span> <span class="token operator">and</span> <span class="token number">40</span><span class="token punctuation">;</span>
 <span class="token keyword">select</span> temperature <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">not</span> <span class="token operator">between</span> <span class="token number">36.5</span> <span class="token operator">and</span> <span class="token number">40</span><span class="token punctuation">;</span>

 <span class="token comment"># Fuzzy matching operator: Use `Like` for fuzzy matching</span>
 <span class="token keyword">select</span> <span class="token operator">*</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">value</span> <span class="token operator">like</span> <span class="token string">&#39;%cc%&#39;</span>
 <span class="token keyword">select</span> <span class="token operator">*</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>device <span class="token keyword">where</span> <span class="token keyword">value</span> <span class="token operator">like</span> <span class="token string">&#39;_b_&#39;</span>

 <span class="token comment"># Fuzzy matching operator: Use `Regexp` for fuzzy matching</span>
 <span class="token keyword">select</span> <span class="token operator">*</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">value</span> <span class="token operator">regexp</span> <span class="token string">&#39;^[A-Za-z]+$&#39;</span>
 <span class="token keyword">select</span> <span class="token operator">*</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">value</span> <span class="token operator">regexp</span> <span class="token string">&#39;^[a-z]+$&#39;</span> <span class="token operator">and</span> <span class="token keyword">time</span> <span class="token operator">&gt;</span> <span class="token number">100</span>
 <span class="token keyword">select</span> b<span class="token punctuation">,</span> b <span class="token operator">like</span> <span class="token string">&#39;1%&#39;</span><span class="token punctuation">,</span> b <span class="token operator">regexp</span> <span class="token string">&#39;[0-2]&#39;</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>

 <span class="token comment"># `IS NULL` operator</span>
 <span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">is</span> <span class="token boolean">null</span><span class="token punctuation">;</span>
 <span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">is</span> <span class="token operator">not</span> <span class="token boolean">null</span><span class="token punctuation">;</span>

 <span class="token comment"># `IN` operator</span>
 <span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> code <span class="token operator">in</span> <span class="token punctuation">(</span><span class="token string">&#39;200&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;300&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;400&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;500&#39;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> code <span class="token operator">not</span> <span class="token operator">in</span> <span class="token punctuation">(</span><span class="token string">&#39;200&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;300&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;400&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;500&#39;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token keyword">select</span> a<span class="token punctuation">,</span> a <span class="token operator">in</span> <span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="逻辑运算符" tabindex="-1"><a class="header-anchor" href="#逻辑运算符"><span>逻辑运算符</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Logical Operators</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> a<span class="token punctuation">,</span> b<span class="token punctuation">,</span> a <span class="token operator">&gt;</span> <span class="token number">10</span><span class="token punctuation">,</span> a <span class="token operator">&lt;=</span> b<span class="token punctuation">,</span> <span class="token operator">!</span><span class="token punctuation">(</span>a <span class="token operator">&lt;=</span> b<span class="token punctuation">)</span><span class="token punctuation">,</span> a <span class="token operator">&gt;</span> <span class="token number">10</span> <span class="token operator">&amp;&amp;</span> a <span class="token operator">&gt;</span> b <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="内置函数" tabindex="-1"><a class="header-anchor" href="#内置函数"><span>内置函数</span></a></h2><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Operator-and-Expression</a></p><h3 id="aggregate-functions" tabindex="-1"><a class="header-anchor" href="#aggregate-functions"><span>Aggregate Functions</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Aggregate Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> <span class="token function">count</span><span class="token punctuation">(</span><span class="token keyword">status</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">;</span>

 <span class="token keyword">select</span> count_if<span class="token punctuation">(</span>s1<span class="token operator">=</span><span class="token number">0</span> <span class="token operator">&amp;</span> s2<span class="token operator">=</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">,</span> count_if<span class="token punctuation">(</span>s1<span class="token operator">=</span><span class="token number">1</span> <span class="token operator">&amp;</span> s2<span class="token operator">=</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>db<span class="token punctuation">.</span>d1<span class="token punctuation">;</span>
 <span class="token keyword">select</span> count_if<span class="token punctuation">(</span>s1<span class="token operator">=</span><span class="token number">0</span> <span class="token operator">&amp;</span> s2<span class="token operator">=</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token string">&#39;ignoreNull&#39;</span><span class="token operator">=</span><span class="token string">&#39;false&#39;</span><span class="token punctuation">)</span><span class="token punctuation">,</span> count_if<span class="token punctuation">(</span>s1<span class="token operator">=</span><span class="token number">1</span> <span class="token operator">&amp;</span> s2<span class="token operator">=</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token string">&#39;ignoreNull&#39;</span><span class="token operator">=</span><span class="token string">&#39;false&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>db<span class="token punctuation">.</span>d1<span class="token punctuation">;</span>

 <span class="token keyword">select</span> time_duration<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>db<span class="token punctuation">.</span>d1<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="算数函数" tabindex="-1"><a class="header-anchor" href="#算数函数"><span>算数函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Arithmetic Operators and Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> sin<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> cos<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> tan<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">limit</span> <span class="token number">5</span> <span class="token keyword">offset</span> <span class="token number">1000</span><span class="token punctuation">;</span>
 <span class="token keyword">select</span> s4<span class="token punctuation">,</span><span class="token function">round</span><span class="token punctuation">(</span>s4<span class="token punctuation">)</span><span class="token punctuation">,</span><span class="token function">round</span><span class="token punctuation">(</span>s4<span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">,</span><span class="token function">round</span><span class="token punctuation">(</span>s4<span class="token punctuation">,</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="比较函数" tabindex="-1"><a class="header-anchor" href="#比较函数"><span>比较函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Comparison Operators and Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> ts<span class="token punctuation">,</span> on_off<span class="token punctuation">(</span>ts<span class="token punctuation">,</span> <span class="token string">&#39;threshold&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>
 <span class="token keyword">select</span> ts<span class="token punctuation">,</span> in_range<span class="token punctuation">(</span>ts<span class="token punctuation">,</span> <span class="token string">&#39;lower&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;upper&#39;</span><span class="token operator">=</span><span class="token string">&#39;3.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="字符串处理函数" tabindex="-1"><a class="header-anchor" href="#字符串处理函数"><span>字符串处理函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">String Processing</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> string_contains<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;s&#39;</span><span class="token operator">=</span><span class="token string">&#39;warn&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d4<span class="token punctuation">;</span>
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> string_matches<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;regex&#39;</span><span class="token operator">=</span><span class="token string">&#39;[^\\s]+37229&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d4<span class="token punctuation">;</span>
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> length<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> locate<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> locate<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;reverse&quot;</span><span class="token operator">=</span><span class="token string">&quot;true&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> startswith<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> endswith<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> concat<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> <span class="token string">&quot;target1&quot;</span><span class="token operator">=</span><span class="token string">&quot;IoT&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;target2&quot;</span><span class="token operator">=</span><span class="token string">&quot;DB&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> concat<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> <span class="token string">&quot;target1&quot;</span><span class="token operator">=</span><span class="token string">&quot;IoT&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;target2&quot;</span><span class="token operator">=</span><span class="token string">&quot;DB&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;series_behind&quot;</span><span class="token operator">=</span><span class="token string">&quot;true&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> substring<span class="token punctuation">(</span>s1 <span class="token keyword">from</span> <span class="token number">1</span> <span class="token keyword">for</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> <span class="token keyword">replace</span><span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;es&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;tt&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> upper<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> lower<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s3<span class="token punctuation">,</span> trim<span class="token punctuation">(</span>s3<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> strcmp<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> strreplace<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;replace&quot;</span><span class="token operator">=</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;limit&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> strreplace<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;replace&quot;</span><span class="token operator">=</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;limit&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;offset&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;reverse&quot;</span><span class="token operator">=</span><span class="token string">&quot;true&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> regexmatch<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;\d+\.\d+\.\d+\.\d+&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;group&quot;</span><span class="token operator">=</span><span class="token string">&quot;0&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> regexreplace<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;192\.168\.0\.(\d+)&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;replace&quot;</span><span class="token operator">=</span><span class="token string">&quot;cluster-$1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;limit&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> regexsplit<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;index&quot;</span><span class="token operator">=</span><span class="token string">&quot;-1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> regexsplit<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;index&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="数据类型转换函数" tabindex="-1"><a class="header-anchor" href="#数据类型转换函数"><span>数据类型转换函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Data Type Conversion Function</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">SELECT</span> cast<span class="token punctuation">(</span>s1 <span class="token keyword">as</span> INT32<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="常序列生成函数" tabindex="-1"><a class="header-anchor" href="#常序列生成函数"><span>常序列生成函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Constant Timeseries Generating Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> const<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;value&#39;</span><span class="token operator">=</span><span class="token string">&#39;1024&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;INT64&#39;</span><span class="token punctuation">)</span><span class="token punctuation">,</span> pi<span class="token punctuation">(</span>s2<span class="token punctuation">)</span><span class="token punctuation">,</span> e<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="选择函数" tabindex="-1"><a class="header-anchor" href="#选择函数"><span>选择函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Selector Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> top_k<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span><span class="token punctuation">,</span> bottom_k<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d2 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&gt;</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">12</span><span class="token operator">-</span><span class="token number">10</span>T20:<span class="token number">36</span>:<span class="token number">15.530</span><span class="token operator">+</span><span class="token number">08</span>:<span class="token number">00</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="区间查询函数" tabindex="-1"><a class="header-anchor" href="#区间查询函数"><span>区间查询函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Continuous Interval Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> zero_count<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> non_zero_count<span class="token punctuation">(</span>s2<span class="token punctuation">)</span><span class="token punctuation">,</span> zero_duration<span class="token punctuation">(</span>s3<span class="token punctuation">)</span><span class="token punctuation">,</span> non_zero_duration<span class="token punctuation">(</span>s4<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d2<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="趋势计算函数" tabindex="-1"><a class="header-anchor" href="#趋势计算函数"><span>趋势计算函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Variation Trend Calculation Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> time_difference<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> difference<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> non_negative_difference<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> derivative<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> non_negative_derivative<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">limit</span> <span class="token number">5</span> <span class="token keyword">offset</span> <span class="token number">1000</span><span class="token punctuation">;</span>

 <span class="token keyword">SELECT</span> DIFF<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> DIFF<span class="token punctuation">(</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>
 <span class="token keyword">SELECT</span> DIFF<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;ignoreNull&#39;</span><span class="token operator">=</span><span class="token string">&#39;false&#39;</span><span class="token punctuation">)</span><span class="token punctuation">,</span> DIFF<span class="token punctuation">(</span>s2<span class="token punctuation">,</span> <span class="token string">&#39;ignoreNull&#39;</span><span class="token operator">=</span><span class="token string">&#39;false&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="采样函数" tabindex="-1"><a class="header-anchor" href="#采样函数"><span>采样函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Sample Functions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> equal_size_bucket_random_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> random_sample <span class="token keyword">from</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">;</span>
 <span class="token keyword">select</span> equal_size_bucket_agg_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;avg&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> agg_avg<span class="token punctuation">,</span> equal_size_bucket_agg_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;max&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> agg_max<span class="token punctuation">,</span> equal_size_bucket_agg_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span><span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;min&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> agg_min<span class="token punctuation">,</span> equal_size_bucket_agg_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;sum&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> agg_sum<span class="token punctuation">,</span> equal_size_bucket_agg_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;extreme&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> agg_extreme<span class="token punctuation">,</span> equal_size_bucket_agg_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;variance&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> agg_variance <span class="token keyword">from</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">;</span>
 <span class="token keyword">select</span> equal_size_bucket_m4_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> M4_sample <span class="token keyword">from</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">;</span>
 <span class="token keyword">select</span> equal_size_bucket_outlier_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;avg&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;number&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> outlier_avg_sample<span class="token punctuation">,</span> equal_size_bucket_outlier_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;stendis&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;number&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> outlier_stendis_sample<span class="token punctuation">,</span> equal_size_bucket_outlier_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;cos&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;number&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> outlier_cos_sample<span class="token punctuation">,</span> equal_size_bucket_outlier_sample<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;proportion&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.1&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;type&#39;</span><span class="token operator">=</span><span class="token string">&#39;prenextdis&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;number&#39;</span><span class="token operator">=</span><span class="token string">&#39;2&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> outlier_prenextdis_sample <span class="token keyword">from</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">;</span>

 <span class="token keyword">select</span> M4<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;timeInterval&#39;</span><span class="token operator">=</span><span class="token string">&#39;25&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;displayWindowBegin&#39;</span><span class="token operator">=</span><span class="token string">&#39;0&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;displayWindowEnd&#39;</span><span class="token operator">=</span><span class="token string">&#39;100&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>vehicle<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> M4<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;windowSize&#39;</span><span class="token operator">=</span><span class="token string">&#39;10&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>vehicle<span class="token punctuation">.</span>d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="时间序列处理函数" tabindex="-1"><a class="header-anchor" href="#时间序列处理函数"><span>时间序列处理函数</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Time-Series</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> change_points<span class="token punctuation">(</span>s1<span class="token punctuation">)</span><span class="token punctuation">,</span> change_points<span class="token punctuation">(</span>s2<span class="token punctuation">)</span><span class="token punctuation">,</span> change_points<span class="token punctuation">(</span>s3<span class="token punctuation">)</span><span class="token punctuation">,</span> change_points<span class="token punctuation">(</span>s4<span class="token punctuation">)</span><span class="token punctuation">,</span> change_points<span class="token punctuation">(</span>s5<span class="token punctuation">)</span><span class="token punctuation">,</span> change_points<span class="token punctuation">(</span>s6<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>testChangePoints<span class="token punctuation">.</span>d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="数据质量函数库" tabindex="-1"><a class="header-anchor" href="#数据质量函数库"><span>数据质量函数库</span></a></h2><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Operator-and-Expression</a></p><h3 id="数据质量" tabindex="-1"><a class="header-anchor" href="#数据质量"><span>数据质量</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Data-Quality</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># Completeness</span>
 <span class="token keyword">select</span> completeness<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>
 <span class="token keyword">select</span> completeness<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;window&quot;</span><span class="token operator">=</span><span class="token string">&quot;15&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">01</span>:<span class="token number">00</span>

 <span class="token comment"># Consistency</span>
 <span class="token keyword">select</span> consistency<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>
 <span class="token keyword">select</span> consistency<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;window&quot;</span><span class="token operator">=</span><span class="token string">&quot;15&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">01</span>:<span class="token number">00</span>

 <span class="token comment"># Timeliness</span>
 <span class="token keyword">select</span> timeliness<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>
 <span class="token keyword">select</span> timeliness<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;window&quot;</span><span class="token operator">=</span><span class="token string">&quot;15&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">01</span>:<span class="token number">00</span>

 <span class="token comment"># Validity</span>
 <span class="token keyword">select</span> Validity<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>
 <span class="token keyword">select</span> Validity<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;window&quot;</span><span class="token operator">=</span><span class="token string">&quot;15&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">01</span>:<span class="token number">00</span>

 <span class="token comment"># Accuracy</span>
 <span class="token keyword">select</span> Accuracy<span class="token punctuation">(</span>t1<span class="token punctuation">,</span>t2<span class="token punctuation">,</span>t3<span class="token punctuation">,</span>m1<span class="token punctuation">,</span>m2<span class="token punctuation">,</span>m3<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="数据画像" tabindex="-1"><a class="header-anchor" href="#数据画像"><span>数据画像</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Data-Profiling</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># ACF</span>
 <span class="token keyword">select</span> acf<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">05</span>

 <span class="token comment"># Distinct</span>
 <span class="token keyword">select</span> <span class="token keyword">distinct</span><span class="token punctuation">(</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># Histogram</span>
 <span class="token keyword">select</span> histogram<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;min&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;max&quot;</span><span class="token operator">=</span><span class="token string">&quot;20&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;count&quot;</span><span class="token operator">=</span><span class="token string">&quot;10&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># Integral</span>
 <span class="token keyword">select</span> integral<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">10</span>
 <span class="token keyword">select</span> integral<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;unit&quot;</span><span class="token operator">=</span><span class="token string">&quot;1m&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">10</span>

 <span class="token comment"># IntegralAvg</span>
 <span class="token keyword">select</span> integralavg<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">10</span>

 <span class="token comment"># Mad</span>
 <span class="token keyword">select</span> mad<span class="token punctuation">(</span>s0<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test
 <span class="token keyword">select</span> mad<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> <span class="token string">&quot;error&quot;</span><span class="token operator">=</span><span class="token string">&quot;0.01&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Median</span>
 <span class="token keyword">select</span> median<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> <span class="token string">&quot;error&quot;</span><span class="token operator">=</span><span class="token string">&quot;0.01&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># MinMax</span>
 <span class="token keyword">select</span> minmax<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Mode</span>
 <span class="token keyword">select</span> <span class="token keyword">mode</span><span class="token punctuation">(</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># MvAvg</span>
 <span class="token keyword">select</span> mvavg<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;window&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># PACF</span>
 <span class="token keyword">select</span> pacf<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;lag&quot;</span><span class="token operator">=</span><span class="token string">&quot;5&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Percentile</span>
 <span class="token keyword">select</span> percentile<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> <span class="token string">&quot;rank&quot;</span><span class="token operator">=</span><span class="token string">&quot;0.2&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;error&quot;</span><span class="token operator">=</span><span class="token string">&quot;0.01&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Quantile</span>
 <span class="token keyword">select</span> quantile<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> <span class="token string">&quot;rank&quot;</span><span class="token operator">=</span><span class="token string">&quot;0.2&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;K&quot;</span><span class="token operator">=</span><span class="token string">&quot;800&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Period</span>
 <span class="token keyword">select</span> period<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d3

 <span class="token comment"># QLB</span>
 <span class="token keyword">select</span> QLB<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># Resample</span>
 <span class="token keyword">select</span> resample<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;every&#39;</span><span class="token operator">=</span><span class="token string">&#39;5m&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;interp&#39;</span><span class="token operator">=</span><span class="token string">&#39;linear&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> resample<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;every&#39;</span><span class="token operator">=</span><span class="token string">&#39;30m&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;aggr&#39;</span><span class="token operator">=</span><span class="token string">&#39;first&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> resample<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;every&#39;</span><span class="token operator">=</span><span class="token string">&#39;30m&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;start&#39;</span><span class="token operator">=</span><span class="token string">&#39;2021-03-06 15:00:00&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># Sample</span>
 <span class="token keyword">select</span> sample<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;method&#39;</span><span class="token operator">=</span><span class="token string">&#39;reservoir&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token string">&#39;5&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> sample<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;method&#39;</span><span class="token operator">=</span><span class="token string">&#39;isometric&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token string">&#39;5&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># Segment</span>
 <span class="token keyword">select</span> segment<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;error&quot;</span><span class="token operator">=</span><span class="token string">&quot;0.1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Skew</span>
 <span class="token keyword">select</span> skew<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># Spline</span>
 <span class="token keyword">select</span> spline<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;points&quot;</span><span class="token operator">=</span><span class="token string">&quot;151&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Spread</span>
 <span class="token keyword">select</span> spread<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>

 <span class="token comment"># Stddev</span>
 <span class="token keyword">select</span> stddev<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># ZScore</span>
 <span class="token keyword">select</span> zscore<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="异常检测" tabindex="-1"><a class="header-anchor" href="#异常检测"><span>异常检测</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Anomaly-Detection</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># IQR</span>
 <span class="token keyword">select</span> iqr<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># KSigma</span>
 <span class="token keyword">select</span> ksigma<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;k&quot;</span><span class="token operator">=</span><span class="token string">&quot;1.0&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>

 <span class="token comment"># LOF</span>
 <span class="token keyword">select</span> lof<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span><span class="token operator">&lt;</span><span class="token number">1000</span>
 <span class="token keyword">select</span> lof<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;method&quot;</span><span class="token operator">=</span><span class="token string">&quot;series&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span><span class="token operator">&lt;</span><span class="token number">1000</span>

 <span class="token comment"># MissDetect</span>
 <span class="token keyword">select</span> missdetect<span class="token punctuation">(</span>s2<span class="token punctuation">,</span><span class="token string">&#39;minlen&#39;</span><span class="token operator">=</span><span class="token string">&#39;10&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># Range</span>
 <span class="token keyword">select</span> range<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;lower_bound&quot;</span><span class="token operator">=</span><span class="token string">&quot;101.0&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;upper_bound&quot;</span><span class="token operator">=</span><span class="token string">&quot;125.0&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">30</span>

 <span class="token comment"># TwoSidedFilter</span>
 <span class="token keyword">select</span> TwoSidedFilter<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> <span class="token string">&#39;len&#39;</span><span class="token operator">=</span><span class="token string">&#39;5&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;threshold&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.3&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># Outlier</span>
 <span class="token keyword">select</span> outlier<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;r&quot;</span><span class="token operator">=</span><span class="token string">&quot;5.0&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;k&quot;</span><span class="token operator">=</span><span class="token string">&quot;4&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;w&quot;</span><span class="token operator">=</span><span class="token string">&quot;10&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;s&quot;</span><span class="token operator">=</span><span class="token string">&quot;5&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># MasterTrain</span>
 <span class="token keyword">select</span> MasterTrain<span class="token punctuation">(</span>lo<span class="token punctuation">,</span>la<span class="token punctuation">,</span>m_lo<span class="token punctuation">,</span>m_la<span class="token punctuation">,</span><span class="token string">&#39;p&#39;</span><span class="token operator">=</span><span class="token string">&#39;3&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;eta&#39;</span><span class="token operator">=</span><span class="token string">&#39;1.0&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># MasterDetect</span>
 <span class="token keyword">select</span> MasterDetect<span class="token punctuation">(</span>lo<span class="token punctuation">,</span>la<span class="token punctuation">,</span>m_lo<span class="token punctuation">,</span>m_la<span class="token punctuation">,</span>model<span class="token punctuation">,</span><span class="token string">&#39;output_type&#39;</span><span class="token operator">=</span><span class="token string">&#39;repair&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;p&#39;</span><span class="token operator">=</span><span class="token string">&#39;3&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token string">&#39;3&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;eta&#39;</span><span class="token operator">=</span><span class="token string">&#39;1.0&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test
 <span class="token keyword">select</span> MasterDetect<span class="token punctuation">(</span>lo<span class="token punctuation">,</span>la<span class="token punctuation">,</span>m_lo<span class="token punctuation">,</span>m_la<span class="token punctuation">,</span>model<span class="token punctuation">,</span><span class="token string">&#39;output_type&#39;</span><span class="token operator">=</span><span class="token string">&#39;anomaly&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;p&#39;</span><span class="token operator">=</span><span class="token string">&#39;3&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token string">&#39;3&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;eta&#39;</span><span class="token operator">=</span><span class="token string">&#39;1.0&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="频域分析" tabindex="-1"><a class="header-anchor" href="#频域分析"><span>频域分析</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Frequency-Domain</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># Conv</span>
 <span class="token keyword">select</span> conv<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># Deconv</span>
 <span class="token keyword">select</span> deconv<span class="token punctuation">(</span>s3<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2
 <span class="token keyword">select</span> deconv<span class="token punctuation">(</span>s3<span class="token punctuation">,</span>s2<span class="token punctuation">,</span><span class="token string">&#39;result&#39;</span><span class="token operator">=</span><span class="token string">&#39;remainder&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># DWT</span>
 <span class="token keyword">select</span> dwt<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;method&quot;</span><span class="token operator">=</span><span class="token string">&quot;haar&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># FFT</span>
 <span class="token keyword">select</span> fft<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> fft<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;result&#39;</span><span class="token operator">=</span><span class="token string">&#39;real&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;compress&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.99&#39;</span><span class="token punctuation">)</span><span class="token punctuation">,</span> fft<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;result&#39;</span><span class="token operator">=</span><span class="token string">&#39;imag&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;compress&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.99&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># HighPass</span>
 <span class="token keyword">select</span> highpass<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;wpass&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.45&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># IFFT</span>
 <span class="token keyword">select</span> ifft<span class="token punctuation">(</span>re<span class="token punctuation">,</span> im<span class="token punctuation">,</span> <span class="token string">&#39;interval&#39;</span><span class="token operator">=</span><span class="token string">&#39;1m&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;start&#39;</span><span class="token operator">=</span><span class="token string">&#39;2021-01-01 00:00:00&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># LowPass</span>
 <span class="token keyword">select</span> lowpass<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;wpass&#39;</span><span class="token operator">=</span><span class="token string">&#39;0.45&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="数据匹配" tabindex="-1"><a class="header-anchor" href="#数据匹配"><span>数据匹配</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Data-Matching</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># Cov</span>
 <span class="token keyword">select</span> cov<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># DTW</span>
 <span class="token keyword">select</span> dtw<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># Pearson</span>
 <span class="token keyword">select</span> pearson<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># PtnSym</span>
 <span class="token keyword">select</span> ptnsym<span class="token punctuation">(</span>s4<span class="token punctuation">,</span> <span class="token string">&#39;window&#39;</span><span class="token operator">=</span><span class="token string">&#39;5&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;threshold&#39;</span><span class="token operator">=</span><span class="token string">&#39;0&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># XCorr</span>
 <span class="token keyword">select</span> xcorr<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> <span class="token keyword">time</span> <span class="token operator">&lt;=</span> <span class="token number">2020</span><span class="token operator">-</span><span class="token number">01</span><span class="token operator">-</span><span class="token number">01</span> <span class="token number">00</span>:<span class="token number">00</span>:<span class="token number">05</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="数据修复" tabindex="-1"><a class="header-anchor" href="#数据修复"><span>数据修复</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Data-Repairing</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># TimestampRepair</span>
 <span class="token keyword">select</span> timestamprepair<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;interval&#39;</span><span class="token operator">=</span><span class="token string">&#39;10000&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2
 <span class="token keyword">select</span> timestamprepair<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># ValueFill</span>
 <span class="token keyword">select</span> valuefill<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2
 <span class="token keyword">select</span> valuefill<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&quot;method&quot;</span><span class="token operator">=</span><span class="token string">&quot;previous&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># ValueRepair</span>
 <span class="token keyword">select</span> valuerepair<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2
 <span class="token keyword">select</span> valuerepair<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;method&#39;</span><span class="token operator">=</span><span class="token string">&#39;LsGreedy&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2

 <span class="token comment"># MasterRepair</span>
 <span class="token keyword">select</span> MasterRepair<span class="token punctuation">(</span>t1<span class="token punctuation">,</span>t2<span class="token punctuation">,</span>t3<span class="token punctuation">,</span>m1<span class="token punctuation">,</span>m2<span class="token punctuation">,</span>m3<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test

 <span class="token comment"># SeasonalRepair</span>
 <span class="token keyword">select</span> seasonalrepair<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;period&#39;</span><span class="token operator">=</span><span class="token number">3</span><span class="token punctuation">,</span><span class="token string">&#39;k&#39;</span><span class="token operator">=</span><span class="token number">2</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2
 <span class="token keyword">select</span> seasonalrepair<span class="token punctuation">(</span>s1<span class="token punctuation">,</span><span class="token string">&#39;method&#39;</span><span class="token operator">=</span><span class="token string">&#39;improved&#39;</span><span class="token punctuation">,</span><span class="token string">&#39;period&#39;</span><span class="token operator">=</span><span class="token number">3</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d2
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="序列发现" tabindex="-1"><a class="header-anchor" href="#序列发现"><span>序列发现</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Series-Discovery</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># ConsecutiveSequences</span>
 <span class="token keyword">select</span> consecutivesequences<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">,</span><span class="token string">&#39;gap&#39;</span><span class="token operator">=</span><span class="token string">&#39;5m&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 <span class="token keyword">select</span> consecutivesequences<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1

 <span class="token comment"># ConsecutiveWindows</span>
 <span class="token keyword">select</span> consecutivewindows<span class="token punctuation">(</span>s1<span class="token punctuation">,</span>s2<span class="token punctuation">,</span><span class="token string">&#39;length&#39;</span><span class="token operator">=</span><span class="token string">&#39;10m&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="机器学习" tabindex="-1"><a class="header-anchor" href="#机器学习"><span>机器学习</span></a></h3><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Machine-Learning</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token comment"># AR</span>
 <span class="token keyword">select</span> ar<span class="token punctuation">(</span>s0<span class="token punctuation">,</span><span class="token string">&quot;p&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d0

 <span class="token comment"># Representation</span>
 <span class="token keyword">select</span> representation<span class="token punctuation">(</span>s0<span class="token punctuation">,</span><span class="token string">&quot;tb&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;vb&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d0

 <span class="token comment"># RM</span>
 <span class="token keyword">select</span> rm<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> s1<span class="token punctuation">,</span><span class="token string">&quot;tb&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;vb&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d0
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="lambda-表达式" tabindex="-1"><a class="header-anchor" href="#lambda-表达式"><span>Lambda 表达式</span></a></h2><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Lambda</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> jexl<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;expr&#39;</span><span class="token operator">=</span><span class="token string">&#39;x -&gt; {x + x}&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> jexl1<span class="token punctuation">,</span> jexl<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;expr&#39;</span><span class="token operator">=</span><span class="token string">&#39;x -&gt; {x * 3}&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> jexl2<span class="token punctuation">,</span> jexl<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;expr&#39;</span><span class="token operator">=</span><span class="token string">&#39;x -&gt; {x * x}&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> jexl3<span class="token punctuation">,</span> jexl<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> <span class="token string">&#39;expr&#39;</span><span class="token operator">=</span><span class="token string">&#39;x -&gt; {multiply(x, 100)}&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> jexl4<span class="token punctuation">,</span> jexl<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> st<span class="token punctuation">,</span> <span class="token string">&#39;expr&#39;</span><span class="token operator">=</span><span class="token string">&#39;(x, y) -&gt; {x + y}&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> jexl5<span class="token punctuation">,</span> jexl<span class="token punctuation">(</span>temperature<span class="token punctuation">,</span> st<span class="token punctuation">,</span> str<span class="token punctuation">,</span> <span class="token string">&#39;expr&#39;</span><span class="token operator">=</span><span class="token string">&#39;(x, y, z) -&gt; {x + y + z}&#39;</span><span class="token punctuation">)</span> <span class="token keyword">as</span> jexl6 <span class="token keyword">from</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01<span class="token punctuation">;</span><span class="token identifier"><span class="token punctuation">`</span><span class="token punctuation">`</span></span><span class="token punctuation">`</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="条件表达式" tabindex="-1"><a class="header-anchor" href="#条件表达式"><span>条件表达式</span></a></h2><p>更多见文档<a class="route-link" href="/zh/UserGuide/V1.2.x/User-Manual/Operator-and-Expression.html">Conditional Expressions</a></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> T<span class="token punctuation">,</span> P<span class="token punctuation">,</span> <span class="token keyword">case</span>
 <span class="token keyword">when</span> <span class="token number">1000</span><span class="token operator">&lt;</span>T <span class="token operator">and</span> T<span class="token operator">&lt;</span><span class="token number">1050</span> <span class="token operator">and</span> <span class="token number">1000000</span><span class="token operator">&lt;</span>P <span class="token operator">and</span> P<span class="token operator">&lt;</span><span class="token number">1100000</span> <span class="token keyword">then</span> <span class="token string">&quot;good!&quot;</span>
 <span class="token keyword">when</span> T<span class="token operator">&lt;=</span><span class="token number">1000</span> <span class="token operator">or</span> T<span class="token operator">&gt;=</span><span class="token number">1050</span> <span class="token keyword">then</span> <span class="token string">&quot;bad temperature&quot;</span>
 <span class="token keyword">when</span> P<span class="token operator">&lt;=</span><span class="token number">1000000</span> <span class="token operator">or</span> P<span class="token operator">&gt;=</span><span class="token number">1100000</span> <span class="token keyword">then</span> <span class="token string">&quot;bad pressure&quot;</span>
 <span class="token keyword">end</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>result<span class="token punctuation">`</span></span>
 <span class="token keyword">from</span> root<span class="token punctuation">.</span>test1

 <span class="token keyword">select</span> str<span class="token punctuation">,</span> <span class="token keyword">case</span>
 <span class="token keyword">when</span> str <span class="token operator">like</span> <span class="token string">&quot;%cc%&quot;</span> <span class="token keyword">then</span> <span class="token string">&quot;has cc&quot;</span>
 <span class="token keyword">when</span> str <span class="token operator">like</span> <span class="token string">&quot;%dd%&quot;</span> <span class="token keyword">then</span> <span class="token string">&quot;has dd&quot;</span>
 <span class="token keyword">else</span> <span class="token string">&quot;no cc and dd&quot;</span> <span class="token keyword">end</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>result<span class="token punctuation">`</span></span>
 <span class="token keyword">from</span> root<span class="token punctuation">.</span>test2

 <span class="token keyword">select</span>
 <span class="token function">count</span><span class="token punctuation">(</span><span class="token keyword">case</span> <span class="token keyword">when</span> x<span class="token operator">&lt;=</span><span class="token number">1</span> <span class="token keyword">then</span> <span class="token number">1</span> <span class="token keyword">end</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>(-∞,1]<span class="token punctuation">`</span></span><span class="token punctuation">,</span>
 <span class="token function">count</span><span class="token punctuation">(</span><span class="token keyword">case</span> <span class="token keyword">when</span> <span class="token number">1</span><span class="token operator">&lt;</span>x <span class="token operator">and</span> x<span class="token operator">&lt;=</span><span class="token number">3</span> <span class="token keyword">then</span> <span class="token number">1</span> <span class="token keyword">end</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>(1,3]<span class="token punctuation">`</span></span><span class="token punctuation">,</span>
 <span class="token function">count</span><span class="token punctuation">(</span><span class="token keyword">case</span> <span class="token keyword">when</span> <span class="token number">3</span><span class="token operator">&lt;</span>x <span class="token operator">and</span> x<span class="token operator">&lt;=</span><span class="token number">7</span> <span class="token keyword">then</span> <span class="token number">1</span> <span class="token keyword">end</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>(3,7]<span class="token punctuation">`</span></span><span class="token punctuation">,</span>
 <span class="token function">count</span><span class="token punctuation">(</span><span class="token keyword">case</span> <span class="token keyword">when</span> <span class="token number">7</span><span class="token operator">&lt;</span>x <span class="token keyword">then</span> <span class="token number">1</span> <span class="token keyword">end</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>(7,+∞)<span class="token punctuation">`</span></span>
 <span class="token keyword">from</span> root<span class="token punctuation">.</span>test3

 <span class="token keyword">select</span> x<span class="token punctuation">,</span> <span class="token keyword">case</span> x <span class="token keyword">when</span> <span class="token number">1</span> <span class="token keyword">then</span> <span class="token string">&quot;one&quot;</span> <span class="token keyword">when</span> <span class="token number">2</span> <span class="token keyword">then</span> <span class="token string">&quot;two&quot;</span> <span class="token keyword">else</span> <span class="token string">&quot;other&quot;</span> <span class="token keyword">end</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test4

 <span class="token keyword">select</span> x<span class="token punctuation">,</span> <span class="token keyword">case</span> x <span class="token keyword">when</span> <span class="token number">1</span> <span class="token keyword">then</span> <span class="token boolean">true</span> <span class="token keyword">when</span> <span class="token number">2</span> <span class="token keyword">then</span> <span class="token boolean">false</span> <span class="token keyword">end</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>result<span class="token punctuation">`</span></span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test4

 <span class="token keyword">select</span> x<span class="token punctuation">,</span> <span class="token keyword">case</span> x
 <span class="token keyword">when</span> <span class="token number">1</span> <span class="token keyword">then</span> <span class="token number">1</span>
 <span class="token keyword">when</span> <span class="token number">2</span> <span class="token keyword">then</span> <span class="token number">222222222222222</span>
 <span class="token keyword">when</span> <span class="token number">3</span> <span class="token keyword">then</span> <span class="token number">3.3</span>
 <span class="token keyword">when</span> <span class="token number">4</span> <span class="token keyword">then</span> <span class="token number">4.4444444444444</span>
 <span class="token keyword">end</span> <span class="token keyword">as</span> <span class="token identifier"><span class="token punctuation">`</span>result<span class="token punctuation">`</span></span>
 <span class="token keyword">from</span> root<span class="token punctuation">.</span>test4
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="触发器" tabindex="-1"><a class="header-anchor" href="#触发器"><span>触发器</span></a></h2><h3 id="使用-sql-语句注册该触发器" tabindex="-1"><a class="header-anchor" href="#使用-sql-语句注册该触发器"><span>使用 SQL 语句注册该触发器</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>// Create Trigger

 createTrigger

     : CREATE triggerType TRIGGER triggerName=identifier triggerEventClause ON pathPattern AS className=STRING_LITERAL uriClause? triggerAttributeClause?

     ;


 triggerType

     : STATELESS | STATEFUL

     ;


 triggerEventClause

     : (BEFORE | AFTER) INSERT

     ;


 uriClause

     : USING URI uri

     ;


 uri

     : STRING_LITERAL

     ;


 triggerAttributeClause

     : WITH LR_BRACKET triggerAttribute (COMMA triggerAttribute)* RR_BRACKET

     ;


 triggerAttribute

     : key=attributeKey operator_eq value=attributeValue

     ;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="sql-语句示例" tabindex="-1"><a class="header-anchor" href="#sql-语句示例"><span>SQL 语句示例</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE STATELESS TRIGGER triggerTest

 BEFORE INSERT

 ON root.sg.**

 AS &#39;org.apache.iotdb.trigger.ClusterAlertingExample&#39;

 USING URI &#39;http://jar/ClusterAlertingExample.jar&#39;

 WITH (

     &quot;name&quot; = &quot;trigger&quot;,

     &quot;limit&quot; = &quot;100&quot;

 )
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="卸载触发器" tabindex="-1"><a class="header-anchor" href="#卸载触发器"><span>卸载触发器</span></a></h3><h4 id="卸载触发器的-sql-语法如下" tabindex="-1"><a class="header-anchor" href="#卸载触发器的-sql-语法如下"><span>卸载触发器的 SQL 语法如下：</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>// Drop Trigger

 dropTrigger

   : DROP TRIGGER triggerName=identifier

 ;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="示例语句" tabindex="-1"><a class="header-anchor" href="#示例语句"><span>示例语句</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>DROP TRIGGER triggerTest1
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="查询触发器" tabindex="-1"><a class="header-anchor" href="#查询触发器"><span>查询触发器</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SHOW TRIGGERS
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="连续查询-continuous-query-cq" tabindex="-1"><a class="header-anchor" href="#连续查询-continuous-query-cq"><span>连续查询（Continuous Query, CQ）</span></a></h2><h3 id="语法" tabindex="-1"><a class="header-anchor" href="#语法"><span>语法</span></a></h3><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>CREATE (CONTINUOUS QUERY | CQ) &lt;cq_id&gt;
 [RESAMPLE
   [EVERY &lt;every_interval&gt;]
   [BOUNDARY &lt;execution_boundary_time&gt;]
   [RANGE &lt;start_time_offset&gt;[, end_time_offset]]
 ]
 [TIMEOUT POLICY BLOCKED|DISCARD]
 BEGIN
     SELECT CLAUSE
         INTO CLAUSE
         FROM CLAUSE
         [WHERE CLAUSE]
         [GROUP BY(&lt;group_by_interval&gt;[, &lt;sliding_step&gt;]) [, level = &lt;level&gt;]]
         [HAVING CLAUSE]
         [FILL {PREVIOUS | LINEAR | constant}]
         [LIMIT rowLimit OFFSET rowOffset]
         [ALIGN BY DEVICE]
 END
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="配置连续查询执行的周期性间隔" tabindex="-1"><a class="header-anchor" href="#配置连续查询执行的周期性间隔"><span>配置连续查询执行的周期性间隔</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE CONTINUOUS QUERY cq1

 RESAMPLE EVERY 20s

 BEGIN

   SELECT max_value(temperature)

   INTO root.ln.wf02.wt02(temperature_max), root.ln.wf02.wt01(temperature_max), root.ln.wf01.wt02(temperature_max), root.ln.wf01.wt01(temperature_max)

   FROM root.ln.*.*

   GROUP BY(10s)

 END


 \&gt; SELECT temperature_max from root.ln.*.*;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="配置连续查询的时间窗口大小" tabindex="-1"><a class="header-anchor" href="#配置连续查询的时间窗口大小"><span>配置连续查询的时间窗口大小</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE CONTINUOUS QUERY cq2

 RESAMPLE RANGE 40s

 BEGIN

   SELECT max_value(temperature)

   INTO root.ln.wf02.wt02(temperature_max), root.ln.wf02.wt01(temperature_max), root.ln.wf01.wt02(temperature_max), root.ln.wf01.wt01(temperature_max)

   FROM root.ln.*.*

   GROUP BY(10s)

 END


 \&gt; SELECT temperature_max from root.ln.*.*;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="同时配置连续查询执行的周期性间隔和时间窗口大小" tabindex="-1"><a class="header-anchor" href="#同时配置连续查询执行的周期性间隔和时间窗口大小"><span>同时配置连续查询执行的周期性间隔和时间窗口大小</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE CONTINUOUS QUERY cq3

 RESAMPLE EVERY 20s RANGE 40s

 BEGIN

   SELECT max_value(temperature)

   INTO root.ln.wf02.wt02(temperature_max), root.ln.wf02.wt01(temperature_max), root.ln.wf01.wt02(temperature_max), root.ln.wf01.wt01(temperature_max)

   FROM root.ln.*.*

   GROUP BY(10s)

   FILL(100.0)

 END


 \&gt; SELECT temperature_max from root.ln.*.*;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="配置连续查询每次查询执行时间窗口的结束时间" tabindex="-1"><a class="header-anchor" href="#配置连续查询每次查询执行时间窗口的结束时间"><span>配置连续查询每次查询执行时间窗口的结束时间</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE CONTINUOUS QUERY cq4

 RESAMPLE EVERY 20s RANGE 40s, 20s

 BEGIN

   SELECT max_value(temperature)

   INTO root.ln.wf02.wt02(temperature_max), root.ln.wf02.wt01(temperature_max), root.ln.wf01.wt02(temperature_max), root.ln.wf01.wt01(temperature_max)

   FROM root.ln.*.*

   GROUP BY(10s)

   FILL(100.0)

 END


 \&gt; SELECT temperature_max from root.ln.*.*;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="没有group-by-time子句的连续查询" tabindex="-1"><a class="header-anchor" href="#没有group-by-time子句的连续查询"><span>没有GROUP BY TIME子句的连续查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE CONTINUOUS QUERY cq5

 RESAMPLE EVERY 20s

 BEGIN

   SELECT temperature + 1

   INTO root.precalculated_sg.::(temperature)

   FROM root.ln.*.*

   align by device

 END


 \&gt; SELECT temperature from root.precalculated_sg.*.* align by device;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="连续查询的管理" tabindex="-1"><a class="header-anchor" href="#连续查询的管理"><span>连续查询的管理</span></a></h3><h4 id="查询系统已有的连续查询" tabindex="-1"><a class="header-anchor" href="#查询系统已有的连续查询"><span>查询系统已有的连续查询</span></a></h4><p>展示集群中所有的已注册的连续查询</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SHOW (CONTINUOUS QUERIES | CQS)

 SHOW CONTINUOUS QUERIES;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="删除已有的连续查询" tabindex="-1"><a class="header-anchor" href="#删除已有的连续查询"><span>删除已有的连续查询</span></a></h4><p>删除指定的名为cq_id的连续查询：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>DROP (CONTINUOUS QUERY | CQ) &lt;cq_id&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>DROP CONTINUOUS QUERY s1_count_cq;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="作为子查询的替代品" tabindex="-1"><a class="header-anchor" href="#作为子查询的替代品"><span>作为子查询的替代品</span></a></h4><p>\1. 创建一个连续查询</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE CQ s1_count_cq

 BEGIN

     SELECT count(s1)

         INTO root.sg_count.d.count_s1

         FROM root.sg.d

         GROUP BY(30m)

 END
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ol><li>查询连续查询的结果</li></ol><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT avg(count_s1) from root.sg_count.d;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="用户自定义函数" tabindex="-1"><a class="header-anchor" href="#用户自定义函数"><span>用户自定义函数</span></a></h2><h3 id="udfparameters" tabindex="-1"><a class="header-anchor" href="#udfparameters"><span>UDFParameters</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT UDF(s1, s2, &#39;key1&#39;=&#39;iotdb&#39;, &#39;key2&#39;=&#39;123.45&#39;) FROM root.sg.d;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="udf-注册" tabindex="-1"><a class="header-anchor" href="#udf-注册"><span>UDF 注册</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE FUNCTION &lt;UDF-NAME&gt; AS &lt;UDF-CLASS-FULL-PATHNAME&gt; (USING URI URI-STRING)?
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="不指定uri" tabindex="-1"><a class="header-anchor" href="#不指定uri"><span>不指定URI</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE FUNCTION example AS &#39;org.apache.iotdb.udf.UDTFExample&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="指定uri" tabindex="-1"><a class="header-anchor" href="#指定uri"><span>指定URI</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE FUNCTION example AS &#39;org.apache.iotdb.udf.UDTFExample&#39; USING URI &#39;http://jar/example.jar&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="udf-卸载" tabindex="-1"><a class="header-anchor" href="#udf-卸载"><span>UDF 卸载</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>DROP FUNCTION &lt;UDF-NAME&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>DROP FUNCTION example
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="udf-查询" tabindex="-1"><a class="header-anchor" href="#udf-查询"><span>UDF 查询</span></a></h3><h4 id="带自定义输入参数的查询" tabindex="-1"><a class="header-anchor" href="#带自定义输入参数的查询"><span>带自定义输入参数的查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT example(s1, &#39;key1&#39;=&#39;value1&#39;, &#39;key2&#39;=&#39;value2&#39;), example(*, &#39;key3&#39;=&#39;value3&#39;) FROM root.sg.d1;

 SELECT example(s1, s2, &#39;key1&#39;=&#39;value1&#39;, &#39;key2&#39;=&#39;value2&#39;) FROM root.sg.d1;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="与其他查询的嵌套查询" tabindex="-1"><a class="header-anchor" href="#与其他查询的嵌套查询"><span>与其他查询的嵌套查询</span></a></h4><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SELECT s1, s2, example(s1, s2) FROM root.sg.d1;

 SELECT *, example(*) FROM root.sg.d1 DISABLE ALIGN;

 SELECT s1 * example(* / s1 + s2) FROM root.sg.d1;

 SELECT s1, s2, s1 + example(s1, s2), s1 - example(s1 + example(s1, s2) / s2) FROM root.sg.d1;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="查看所有注册的-udf" tabindex="-1"><a class="header-anchor" href="#查看所有注册的-udf"><span>查看所有注册的 UDF</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>SHOW FUNCTIONS
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="权限管理" tabindex="-1"><a class="header-anchor" href="#权限管理"><span>权限管理</span></a></h2><h3 id="_1、创建用户" tabindex="-1"><a class="header-anchor" href="#_1、创建用户"><span>1、创建用户</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>CREATE USER `ln_write_user` &#39;write_pwd&#39;

 CREATE USER `sgcc_write_user` &#39;write_pwd&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_2、展示用户" tabindex="-1"><a class="header-anchor" href="#_2、展示用户"><span>2、展示用户</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>LIST USER
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_3、赋予用户权限" tabindex="-1"><a class="header-anchor" href="#_3、赋予用户权限"><span>3、赋予用户权限</span></a></h3><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>INSERT INTO root.ln.wf01.wt01(timestamp,status) values(1509465600000,true)

 系统不允许用户进行此操作，会提示错误：

 IoTDB&gt; INSERT INTO root.ln.wf01.wt01(timestamp,status) values(1509465600000,true)

 Msg: 602: No permissions for this operation, please add privilege INSERT_TIMESERIES.

 用root用户分别赋予他们向对应 database 数据的写入权限

 GRANT USER `ln_write_user` PRIVILEGES INSERT_TIMESERIES on root.ln.**

 GRANT USER `sgcc_write_user` PRIVILEGES INSERT_TIMESERIES on root.sgcc1.**, root.sgcc2.**

 GRANT USER `ln_write_user` PRIVILEGES CREATE_USER

 使用ln_write_user再尝试写入数据

 IoTDB&gt; INSERT INTO root.ln.wf01.wt01(timestamp, status) values(1509465600000, true)

 Msg: The statement is executed successfully.
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_4、撤销用户权限" tabindex="-1"><a class="header-anchor" href="#_4、撤销用户权限"><span>4、撤销用户权限</span></a></h3><p>用root用户撤销ln_write_user和sgcc_write_user的权限：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>REVOKE USER `ln_write_user` PRIVILEGES INSERT_TIMESERIES on root.ln.**

 REVOKE USER `sgcc_write_user` PRIVILEGES INSERT_TIMESERIES on root.sgcc1.**, root.sgcc2.**

 REVOKE USER `ln_write_user` PRIVILEGES CREATE_USER
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>撤销权限后，ln_write_user就没有向root.ln.**写入数据的权限了</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>INSERT INTO root.ln.wf01.wt01(timestamp, status) values(1509465600000, true)

 Msg: 602: No permissions for this operation, please add privilege INSERT_TIMESERIES.
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_5、sql-语句" tabindex="-1"><a class="header-anchor" href="#_5、sql-语句"><span>5、SQL 语句</span></a></h3><ul><li>创建用户</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>CREATE USER &lt;userName&gt; &lt;password&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; CREATE USER <code>thulab</code> &#39;passwd&#39;;</p><ul><li>删除用户</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>DROP USER &lt;userName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; DROP USER <code>xiaoming</code>;</p><ul><li>创建角色</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>CREATE ROLE &lt;roleName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; CREATE ROLE <code>admin</code>;</p><ul><li>删除角色</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>DROP USER &lt;userName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; DROP USER <code>xiaoming</code>;</p><ul><li>赋予用户权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>GRANT USER &lt;userName&gt; PRIVILEGES &lt;privileges&gt; ON &lt;nodeNames&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; GRANT USER <code>tempuser</code> PRIVILEGES INSERT_TIMESERIES, DELETE_TIMESERIES on root.ln.<strong>, root.sgcc.</strong>;</p><p>Eg: IoTDB &gt; GRANT USER <code>tempuser</code> PRIVILEGES CREATE_ROLE;</p><ul><li>赋予用户全部的权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>GRANT USER &lt;userName&gt; PRIVILEGES ALL;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; GRANT USER <code>tempuser</code> PRIVILEGES ALL;</p><ul><li>赋予角色权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>GRANT ROLE &lt;roleName&gt; PRIVILEGES &lt;privileges&gt; ON &lt;nodeNames&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; GRANT ROLE <code>temprole</code> PRIVILEGES INSERT_TIMESERIES, DELETE_TIMESERIES ON root.sgcc.<strong>, root.ln.</strong>;</p><p>Eg: IoTDB &gt; GRANT ROLE <code>temprole</code> PRIVILEGES CREATE_ROLE;</p><ul><li>赋予角色全部的权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>GRANT ROLE &lt;roleName&gt; PRIVILEGES ALL;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; GRANT ROLE <code>temprole</code> PRIVILEGES ALL;</p><ul><li>赋予用户角色</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>GRANT &lt;roleName&gt; TO &lt;userName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; GRANT <code>temprole</code> TO tempuser;</p><ul><li>撤销用户权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>REVOKE USER &lt;userName&gt; PRIVILEGES &lt;privileges&gt; ON &lt;nodeNames&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; REVOKE USER <code>tempuser</code> PRIVILEGES DELETE_TIMESERIES on root.ln.**;</p><p>Eg: IoTDB &gt; REVOKE USER <code>tempuser</code> PRIVILEGES CREATE_ROLE;</p><ul><li>移除用户所有权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>REVOKE USER &lt;userName&gt; PRIVILEGES ALL;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; REVOKE USER <code>tempuser</code> PRIVILEGES ALL;</p><ul><li>撤销角色权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>REVOKE ROLE &lt;roleName&gt; PRIVILEGES &lt;privileges&gt; ON &lt;nodeNames&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; REVOKE ROLE <code>temprole</code> PRIVILEGES DELETE_TIMESERIES ON root.ln.**;</p><p>Eg: IoTDB &gt; REVOKE ROLE <code>temprole</code> PRIVILEGES CREATE_ROLE;</p><ul><li>撤销角色全部的权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>REVOKE ROLE &lt;roleName&gt; PRIVILEGES ALL;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; REVOKE ROLE <code>temprole</code> PRIVILEGES ALL;</p><ul><li>撤销用户角色</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>REVOKE &lt;roleName&gt; FROM &lt;userName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; REVOKE <code>temprole</code> FROM tempuser;</p><ul><li>列出所有用户</li></ul><p>LIST USER</p><p>Eg: IoTDB &gt; LIST USER</p><ul><li>列出指定角色下所有用户</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>LIST USER OF ROLE &lt;roleName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; LIST USER OF ROLE <code>roleuser</code>;</p><ul><li>列出所有角色</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>REVOKE &lt;roleName&gt; FROM &lt;userName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; REVOKE <code>temprole</code> FROM tempuser;</p><ul><li>列出指定用户下所有角色</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>LIST USER OF ROLE &lt;roleName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; LIST USER OF ROLE <code>roleuser</code>;</p><ul><li>列出用户所有权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>LIST PRIVILEGES USER &lt;username&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; LIST PRIVILEGES USER <code>tempuser</code>;</p><ul><li>列出用户在具体路径上相关联的权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>LIST PRIVILEGES USER &lt;username&gt; ON &lt;paths&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB&gt; LIST PRIVILEGES USER <code>tempuser</code> ON root.ln.<strong>, root.ln.wf01.</strong>;</p><p>IoTDB&gt; LIST PRIVILEGES USER <code>tempuser</code> ON root.ln.wf01.wt01.**;</p><ul><li>列出角色所有权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>LIST PRIVILEGES ROLE &lt;roleName&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; LIST PRIVILEGES ROLE <code>actor</code>;</p><ul><li>列出角色在具体路径上相关联的权限</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>LIST PRIVILEGES ROLE &lt;roleName&gt; ON &lt;paths&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB&gt; LIST PRIVILEGES ROLE <code>temprole</code> ON root.ln.<strong>, root.ln.wf01.wt01.</strong>;</p><p>IoTDB&gt; LIST PRIVILEGES ROLE <code>temprole</code> ON root.ln.wf01.wt01.**;</p><ul><li>更新密码</li></ul><div class="language-Go line-numbers-mode" data-ext="Go" data-title="Go"><pre class="language-Go"><code>ALTER USER &lt;username&gt; SET PASSWORD &lt;password&gt;;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg: IoTDB &gt; ALTER USER <code>tempuser</code> SET PASSWORD &#39;newpwd&#39;;</p><h3 id="_6、非root用户限制进行的操作" tabindex="-1"><a class="header-anchor" href="#_6、非root用户限制进行的操作"><span>6、非root用户限制进行的操作</span></a></h3><h4 id="tsfile管理" tabindex="-1"><a class="header-anchor" href="#tsfile管理"><span>TsFile管理</span></a></h4><ul><li>加载TsFile</li></ul><p>Eg: IoTDB &gt; load &#39;/Users/Desktop/data/1575028885956-101-0.tsfile&#39;</p><ul><li>删除TsFile文件</li></ul><p>Eg: IoTDB &gt; remove &#39;/Users/Desktop/data/data/root.vehicle/0/0/1575028885956-101-0.tsfile&#39;</p><ul><li>卸载TsFile文件到指定目录</li></ul><p>Eg: IoTDB &gt; unload &#39;/Users/Desktop/data/data/root.vehicle/0/0/1575028885956-101-0.tsfile&#39; &#39;/data/data/tmp&#39;</p><h4 id="删除时间分区-实验性功能" tabindex="-1"><a class="header-anchor" href="#删除时间分区-实验性功能"><span>删除时间分区（实验性功能）</span></a></h4><ul><li>删除时间分区（实验性功能）</li></ul><p>Eg: IoTDB &gt; DELETE PARTITION root.ln 0,1,2</p><h4 id="连续查询" tabindex="-1"><a class="header-anchor" href="#连续查询"><span>连续查询</span></a></h4><ul><li>连续查询(CQ)</li></ul><p>Eg: IoTDB &gt; CREATE CONTINUOUS QUERY cq1 BEGIN SELECT max_value(temperature) INTO temperature_max FROM root.ln.<em>.</em> GROUP BY time(10s) END</p><h4 id="运维命令" tabindex="-1"><a class="header-anchor" href="#运维命令"><span>运维命令</span></a></h4><ul><li>FLUSH</li></ul><p>Eg: IoTDB &gt; flush</p><ul><li>MERGE</li></ul><p>Eg: IoTDB &gt; MERGE</p><p>Eg: IoTDB &gt; FULL MERGE</p><ul><li>CLEAR CACHE</li></ul><p>Eg: IoTDB &gt; CLEAR CACHE</p><ul><li>SET SYSTEM TO READONLY / WRITABLE</li></ul><p>Eg: IoTDB &gt; SET SYSTEM TO READONLY / WRITABLE</p><ul><li>查询终止</li></ul><p>Eg: IoTDB &gt; KILL QUERY 1</p><h4 id="水印工具" tabindex="-1"><a class="header-anchor" href="#水印工具"><span>水印工具</span></a></h4><ul><li>为新用户施加水印</li></ul><p>Eg: IoTDB &gt; grant watermark_embedding to Alice</p><ul><li>撤销水印</li></ul><p>Eg: IoTDB &gt; revoke watermark_embedding from Alice</p></div><!--[--><!----><!--]--><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a href="https://github.com/apache/iotdb-docs/edit/main/src/zh/UserGuide/V1.2.x/SQL-Manual/SQL-Manual.md" rel="noopener noreferrer" target="_blank" aria-label="发现错误？在 GitHub 上编辑此页" class="nav-link vp-meta-label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->发现错误？在 GitHub 上编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="vp-meta-item git-info"><div class="update-time"><span class="vp-meta-label">上次编辑于: </span><!----></div><!----></div></footer><!----><!----><!--[--><!----><!--]--><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">rel/1.2</span><p style="text-align:center;color:#909399;font-size:12px;margin:0 30px;">Copyright © 2024 The Apache Software Foundation.<br> Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>Have a question?</strong> Connect with us on QQ, WeChat, or Slack. <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> now.</p></footer></div><!--]--><!--]--><!--[--><!----><!--]--><!--]--></div>
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