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class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">数据查询</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable active" type="button"><!----><span class="vp-sidebar-title">运算符和函数</span><span class="vp-arrow down"></span></button><ul class="vp-sidebar-links"><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Overview.html"><!---->概述<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/User-Defined-Function.html"><!---->用户自定义函数<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Aggregation.html"><!---->聚合函数<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Mathematical.html"><!---->算数运算符和函数<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link active vp-sidebar-link vp-sidebar-page active" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html"><!---->比较运算符和函数<!----></a><ul class="vp-sidebar-sub-headers"><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#比较运算符和函数"><!---->比较运算符和函数<!----></a><ul class="vp-sidebar-sub-headers"><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#基本比较运算符"><!---->基本比较运算符<!----></a><ul class="vp-sidebar-sub-headers"></ul></li><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#between-and-运算符"><!---->BETWEEN ... AND ... 运算符<!----></a><ul class="vp-sidebar-sub-headers"></ul></li><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#模糊匹配运算符"><!---->模糊匹配运算符<!----></a><ul class="vp-sidebar-sub-headers"></ul></li><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#is-null-运算符"><!---->IS NULL 运算符<!----></a><ul class="vp-sidebar-sub-headers"></ul></li><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#in-运算符"><!---->IN 运算符<!----></a><ul class="vp-sidebar-sub-headers"></ul></li><li class="vp-sidebar-sub-header"><a class="vp-link nav-link vp-sidebar-link vp-heading" href="/zh/UserGuide/V1.1.x/Operators-Functions/Comparison.html#条件函数"><!---->条件函数<!----></a><ul class="vp-sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Logical.html"><!---->逻辑运算符<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/String.html"><!---->字符串处理<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Conversion.html"><!---->数据类型转换<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Constant.html"><!---->常序列生成<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Selection.html"><!---->选择函数<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Continuous-Interval.html"><!---->区间查询<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Variation-Trend.html"><!---->趋势计算<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Sample.html"><!---->采样函数<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Time-Series.html"><!---->时间序列处理<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Lambda.html"><!---->Lambda 表达式<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Data-Profiling.html"><!---->数据画像<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Anomaly-Detection.html"><!---->异常检测<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Data-Matching.html"><!---->数据匹配<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Frequency-Domain.html"><!---->频域分析<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Data-Quality.html"><!---->数据质量<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Data-Repairing.html"><!---->数据修复<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Series-Discovery.html"><!---->序列发现<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a class="vp-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.1.x/Operators-Functions/Machine-Learning.html"><!---->机器学习<!----></a><ul 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AND ... 运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#模糊匹配运算符">模糊匹配运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#is-null-运算符">IS NULL 运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#in-运算符">IN 运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#条件函数">条件函数</a></li><!----><!--]--></ul></li><!--]--></ul><div class="toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><!-- |
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| --><h2 id="比较运算符和函数" tabindex="-1"><a class="header-anchor" href="#比较运算符和函数" aria-hidden="true">#</a> 比较运算符和函数</h2><h3 id="基本比较运算符" tabindex="-1"><a class="header-anchor" href="#基本比较运算符" aria-hidden="true">#</a> 基本比较运算符</h3><ul><li>输入数据类型: <code>INT32</code>, <code>INT64</code>, <code>FLOAT</code>, <code>DOUBLE</code>。</li><li>注意:会将所有数据转换为<code>DOUBLE</code>类型后进行比较。<code>==</code>和<code>!=</code>可以直接比较两个<code>BOOLEAN</code>。</li><li>返回类型:<code>BOOLEAN</code>。</li></ul><table><thead><tr><th>运算符</th><th>含义</th></tr></thead><tbody><tr><td><code>></code></td><td>大于</td></tr><tr><td><code>>=</code></td><td>大于等于</td></tr><tr><td><code><</code></td><td>小于</td></tr><tr><td><code><=</code></td><td>小于等于</td></tr><tr><td><code>==</code></td><td>等于</td></tr><tr><td><code>!=</code> / <code><></code></td><td>不等于</td></tr></tbody></table><p><strong>示例:</strong></p><div class="language-sql line-numbers-mode" data-ext="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">></span> <span class="token number">10</span><span class="token punctuation">,</span> a <span class="token operator"><=</span> b<span class="token punctuation">,</span> <span class="token operator">!</span><span class="token punctuation">(</span>a <span class="token operator"><=</span> b<span class="token punctuation">)</span><span class="token punctuation">,</span> a <span class="token operator">></span> <span class="token number">10</span> <span class="token operator">&&</span> a <span class="token operator">></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><p>运行结果</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> select a, b, a > 10, a <= b, !(a <= b), a > 10 && a > b from root.test; |
| +-----------------------------+-----------+-----------+----------------+--------------------------+---------------------------+------------------------------------------------+ |
| | Time|root.test.a|root.test.b|root.test.a > 10|root.test.a <= root.test.b|!root.test.a <= root.test.b|(root.test.a > 10) & (root.test.a > root.test.b)| |
| +-----------------------------+-----------+-----------+----------------+--------------------------+---------------------------+------------------------------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 23| 10.0| true| false| true| true| |
| |1970-01-01T08:00:00.002+08:00| 33| 21.0| true| false| true| true| |
| |1970-01-01T08:00:00.004+08:00| 13| 15.0| true| true| false| false| |
| |1970-01-01T08:00:00.005+08:00| 26| 0.0| true| false| true| true| |
| |1970-01-01T08:00:00.008+08:00| 1| 22.0| false| true| false| false| |
| |1970-01-01T08:00:00.010+08:00| 23| 12.0| true| false| true| true| |
| +-----------------------------+-----------+-----------+----------------+--------------------------+---------------------------+------------------------------------------------+ |
| </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><h3 id="between-and-运算符" tabindex="-1"><a class="header-anchor" href="#between-and-运算符" aria-hidden="true">#</a> <code>BETWEEN ... AND ...</code> 运算符</h3><table><thead><tr><th>运算符</th><th>含义</th></tr></thead><tbody><tr><td><code>BETWEEN ... AND ...</code></td><td>在指定范围内</td></tr><tr><td><code>NOT BETWEEN ... AND ...</code></td><td>不在指定范围内</td></tr></tbody></table><p><strong>示例:</strong> 选择区间 [36.5,40] 内或之外的数据:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="模糊匹配运算符" tabindex="-1"><a class="header-anchor" href="#模糊匹配运算符" aria-hidden="true">#</a> 模糊匹配运算符</h3><p>对于 TEXT 类型的数据,支持使用 <code>Like</code> 和 <code>Regexp</code> 运算符对数据进行模糊匹配</p><table><thead><tr><th>运算符</th><th>含义</th></tr></thead><tbody><tr><td><code>LIKE</code></td><td>匹配简单模式</td></tr><tr><td><code>NOT LIKE</code></td><td>无法匹配简单模式</td></tr><tr><td><code>REGEXP</code></td><td>匹配正则表达式</td></tr><tr><td><code>NOT REGEXP</code></td><td>无法匹配正则表达式</td></tr></tbody></table><p>输入数据类型:<code>TEXT</code></p><p>返回类型:<code>BOOLEAN</code></p><h4 id="使用-like-进行模糊匹配" tabindex="-1"><a class="header-anchor" href="#使用-like-进行模糊匹配" aria-hidden="true">#</a> 使用 <code>Like</code> 进行模糊匹配</h4><p><strong>匹配规则:</strong></p><ul><li><code>%</code> 表示任意0个或多个字符。</li><li><code>_</code> 表示任意单个字符。</li></ul><p><strong>示例 1:</strong> 查询 <code>root.sg.d1</code> 下 <code>value</code> 含有<code>'cc'</code>的数据。</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.d1 where value like <span class="token string">'%cc%'</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:00.000+08:00<span class="token operator">|</span> aabbccdd<span class="token operator">|</span> |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:01.000+08:00<span class="token operator">|</span> cc<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0</span>.002s |
| </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><p><strong>示例 2:</strong> 查询 <code>root.sg.d1</code> 下 <code>value</code> 中间为 <code>'b'</code>、前后为任意单个字符的数据。</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.device where value like <span class="token string">'_b_'</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:02.000+08:00<span class="token operator">|</span> abc<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">1</span> |
| It costs <span class="token number">0</span>.002s |
| </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="使用-regexp-进行模糊匹配" tabindex="-1"><a class="header-anchor" href="#使用-regexp-进行模糊匹配" aria-hidden="true">#</a> 使用 <code>Regexp</code> 进行模糊匹配</h4><p>需要传入的过滤条件为 <strong>Java 标准库风格的正则表达式</strong>。</p><p><strong>常见的正则匹配举例:</strong></p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>长度为3-20的所有字符:^.{3,20}$ |
| 大写英文字符:^[A-Z]+$ |
| 数字和英文字符:^[A-Za-z0-9]+$ |
| 以a开头的:^a.* |
| </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><p><strong>示例 1:</strong> 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-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.d1 where value regexp <span class="token string">'^[A-Za-z]+$'</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:00.000+08:00<span class="token operator">|</span> aabbccdd<span class="token operator">|</span> |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:01.000+08:00<span class="token operator">|</span> cc<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0</span>.002s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>示例 2:</strong> 查询 root.sg.d1 下 value 值为26个小写英文字符组成的字符串且时间大于100的。</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.d1 where value regexp <span class="token string">'^[a-z]+$'</span> and <span class="token function">time</span> <span class="token operator">></span> <span class="token number">100</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:00.000+08:00<span class="token operator">|</span> aabbccdd<span class="token operator">|</span> |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:01.000+08:00<span class="token operator">|</span> cc<span class="token operator">|</span> |
| +-----------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0</span>.002s |
| </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><p><strong>示例 3:</strong></p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> b<span class="token punctuation">,</span> b <span class="token operator">like</span> <span class="token string">'1%'</span><span class="token punctuation">,</span> b <span class="token operator">regexp</span> <span class="token string">'[0-2]'</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></div><p>运行结果</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------+-------------------------+--------------------------+ |
| | Time|root.test.b|root.test.b LIKE '^1.*?$'|root.test.b REGEXP '[0-2]'| |
| +-----------------------------+-----------+-------------------------+--------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 111test111| true| true| |
| |1970-01-01T08:00:00.003+08:00| 333test333| false| false| |
| +-----------------------------+-----------+-------------------------+--------------------------+ |
| </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="is-null-运算符" tabindex="-1"><a class="header-anchor" href="#is-null-运算符" aria-hidden="true">#</a> <code>IS NULL</code> 运算符</h3><table><thead><tr><th>运算符</th><th>含义</th></tr></thead><tbody><tr><td><code>IS NULL</code></td><td>是空值</td></tr><tr><td><code>IS NOT NULL</code></td><td>不是空值</td></tr></tbody></table><p><strong>示例 1:</strong> 选择值为空的数据:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><strong>示例 2:</strong> 选择值为非空的数据:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="in-运算符" tabindex="-1"><a class="header-anchor" href="#in-运算符" aria-hidden="true">#</a> <code>IN</code> 运算符</h3><table><thead><tr><th>运算符</th><th>含义</th></tr></thead><tbody><tr><td><code>IN</code> / <code>CONTAINS</code></td><td>是指定列表中的值</td></tr><tr><td><code>NOT IN</code> / <code>NOT CONTAINS</code></td><td>不是指定列表中的值</td></tr></tbody></table><p>输入数据类型:<code>All Types</code></p><p>返回类型 <code>BOOLEAN</code></p><p><strong>注意:请确保集合中的值可以被转为输入数据的类型。</strong></p><blockquote><p>例如:</p><p><code>s1 in (1, 2, 3, 'test')</code>,<code>s1</code>的数据类型是<code>INT32</code></p><p>我们将会抛出异常,因为<code>'test'</code>不能被转为<code>INT32</code>类型</p></blockquote><p><strong>示例 1:</strong> 选择值在特定范围内的数据:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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">'200'</span><span class="token punctuation">,</span> <span class="token string">'300'</span><span class="token punctuation">,</span> <span class="token string">'400'</span><span class="token punctuation">,</span> <span class="token string">'500'</span><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><strong>示例 2:</strong> 选择值在特定范围外的数据:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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">'200'</span><span class="token punctuation">,</span> <span class="token string">'300'</span><span class="token punctuation">,</span> <span class="token string">'400'</span><span class="token punctuation">,</span> <span class="token string">'500'</span><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><strong>示例 3:</strong></p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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></div><p>输出2:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------+--------------------+ |
| | Time|root.test.a|root.test.a IN (1,2)| |
| +-----------------------------+-----------+--------------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| true| |
| |1970-01-01T08:00:00.003+08:00| 3| false| |
| +-----------------------------+-----------+--------------------+ |
| </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="条件函数" tabindex="-1"><a class="header-anchor" href="#条件函数" aria-hidden="true">#</a> 条件函数</h3><p>条件函数针对每个数据点进行条件判断,返回布尔值。</p><table><thead><tr><th>函数名</th><th>可接收的输入序列类型</th><th>必要的属性参数</th><th>输出序列类型</th><th>功能类型</th></tr></thead><tbody><tr><td>ON_OFF</td><td>INT32 / INT64 / FLOAT / DOUBLE</td><td><code>threshold</code>:DOUBLE类型</td><td>BOOLEAN 类型</td><td>返回<code>ts_value >= threshold</code>的bool值</td></tr><tr><td>IN_RANGE</td><td>INT32 / INT64 / FLOAT / DOUBLE</td><td><code>lower</code>:DOUBLE类型<br><code>upper</code>:DOUBLE类型</td><td>BOOLEAN类型</td><td>返回<code>ts_value >= lower && ts_value <= upper</code>的bool值</td></tr></tbody></table><p>测试数据:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> select ts from root.test; |
| +-----------------------------+------------+ |
| | Time|root.test.ts| |
| +-----------------------------+------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| |
| |1970-01-01T08:00:00.002+08:00| 2| |
| |1970-01-01T08:00:00.003+08:00| 3| |
| |1970-01-01T08:00:00.004+08:00| 4| |
| +-----------------------------+------------+ |
| </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><p><strong>示例 1:</strong></p><p>SQL语句:</p><div class="language-sql line-numbers-mode" data-ext="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">'threshold'</span><span class="token operator">=</span><span class="token string">'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></div><p>输出:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> select ts, on_off(ts, 'threshold'='2') from root.test; |
| +-----------------------------+------------+-------------------------------------+ |
| | Time|root.test.ts|on_off(root.test.ts, "threshold"="2")| |
| +-----------------------------+------------+-------------------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| false| |
| |1970-01-01T08:00:00.002+08:00| 2| true| |
| |1970-01-01T08:00:00.003+08:00| 3| true| |
| |1970-01-01T08:00:00.004+08:00| 4| true| |
| +-----------------------------+------------+-------------------------------------+ |
| </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><p><strong>示例 2:</strong></p><p>Sql语句:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><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">'lower'</span><span class="token operator">=</span><span class="token string">'2'</span><span class="token punctuation">,</span> <span class="token string">'upper'</span><span class="token operator">=</span><span class="token string">'3.1'</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></div><p>输出:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> select ts, in_range(ts, 'lower'='2', 'upper'='3.1') from root.test; |
| +-----------------------------+------------+--------------------------------------------------+ |
| | Time|root.test.ts|in_range(root.test.ts, "lower"="2", "upper"="3.1")| |
| +-----------------------------+------------+--------------------------------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| false| |
| |1970-01-01T08:00:00.002+08:00| 2| true| |
| |1970-01-01T08:00:00.003+08:00| 3| true| |
| |1970-01-01T08:00:00.004+08:00| 4| false| |
| +-----------------------------+------------+--------------------------------------------------+ |
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