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    <link rel="alternate" hreflang="en-us" href="https://iotdb.apache.org/UserGuide/V0.13.x/Operate-Metadata/Storage-Group.html"><meta property="og:url" content="https://iotdb.apache.org/zh/UserGuide/V0.13.x/Operate-Metadata/Storage-Group.html"><meta property="og:site_name" content="IoTDB Website"><meta property="og:title" content="元数据操作"><meta property="og:description" content="元数据操作 存储组管理 创建存储组 我们可以根据存储模型建立相应的存储组。创建存储组支持两种 SQL 语句，如下所示： 根据以上两条 SQL 语句，我们可以创建出两个存储组。 需要注意的是，存储组的父子节点都不能再设置存储组。例如在已经有root.ln和root.sgcc这两个存储组的情况下，创建root.ln.wf01存储组是不可行的。系统将给出相应..."><meta property="og:type" content="article"><meta property="og:locale" content="zh-CN"><meta property="og:locale:alternate" content="en-US"><meta property="og:updated_time" content="2023-07-10T03:11:17.000Z"><meta property="article:modified_time" content="2023-07-10T03:11:17.000Z"><script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"元数据操作","image":[""],"dateModified":"2023-07-10T03:11:17.000Z","author":[]}</script><link rel="icon" href="/favicon.ico"><meta name="Description" content="Apache IoTDB: Time Series Database for IoT"><meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management,时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据"><meta name="baidu-site-verification" content="wfKETzB3OT"><meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo"><script type="text/javascript">
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       </script><title>元数据操作 | IoTDB Website</title><meta name="description" content="元数据操作 存储组管理 创建存储组 我们可以根据存储模型建立相应的存储组。创建存储组支持两种 SQL 语句，如下所示： 根据以上两条 SQL 语句，我们可以创建出两个存储组。 需要注意的是，存储组的父子节点都不能再设置存储组。例如在已经有root.ln和root.sgcc这两个存储组的情况下，创建root.ln.wf01存储组是不可行的。系统将给出相应...">
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364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button><div class="arrow end"></div></div><div class="vp-toc-wrapper"><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#存储组管理">存储组管理</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#创建存储组">创建存储组</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#查看存储组">查看存储组</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#删除存储组">删除存储组</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="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></h1><h2 id="存储组管理" tabindex="-1"><a class="header-anchor" href="#存储组管理"><span>存储组管理</span></a></h2><h3 id="创建存储组" tabindex="-1"><a class="header-anchor" href="#创建存储组"><span>创建存储组</span></a></h3><p>我们可以根据存储模型建立相应的存储组。创建存储组支持两种 SQL 语句，如下所示：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB &gt; set storage group to root.ln
IoTDB &gt; create storage group root.sgcc
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>根据以上两条 SQL 语句，我们可以创建出两个存储组。</p><p>需要注意的是，存储组的父子节点都不能再设置存储组。例如在已经有<code>root.ln</code>和<code>root.sgcc</code>这两个存储组的情况下，创建<code>root.ln.wf01</code>存储组是不可行的。系统将给出相应的错误提示，如下所示：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; set storage group to root.ln.wf01
Msg: 300: root.ln has already been set to storage group.
IoTDB&gt; create storage group root.ln.wf01
Msg: 300: root.ln has already been set to storage group.
</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>存储组节点名只支持中英文字符、数字、下划线和中划线的组合。</p><p>还需注意，如果在 Windows 系统上部署，存储组名是大小写不敏感的。例如同时创建<code>root.ln</code> 和 <code>root.LN</code> 是不被允许的。</p><h3 id="查看存储组" tabindex="-1"><a class="header-anchor" href="#查看存储组"><span>查看存储组</span></a></h3><p>在存储组创建后，我们可以使用 <a class="route-link" href="/zh/UserGuide/V0.13.x/Reference/SQL-Reference.html">SHOW STORAGE GROUP</a> 语句和 <a class="route-link" href="/zh/UserGuide/V0.13.x/Reference/SQL-Reference.html">SHOW STORAGE GROUP &lt;PathPattern&gt;</a> 来查看存储组，SQL 语句如下所示：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB&gt; show storage group
IoTDB&gt; show storage group root.*
IoTDB&gt; show storage group 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></div><p>执行结果为：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>+-------------+
|storage group|
+-------------+
|    root.sgcc|
|      root.ln|
+-------------+
Total line number = 2
It costs 0.060s
</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><h3 id="删除存储组" tabindex="-1"><a class="header-anchor" href="#删除存储组"><span>删除存储组</span></a></h3><p>用户可以使用<code>DELETE STORAGE GROUP &lt;PathPattern&gt;</code>语句删除该路径模式匹配的所有的存储组。在删除的过程中，需要注意的是存储组的数据也会被删除。</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB &gt; DELETE STORAGE GROUP root.ln
IoTDB &gt; DELETE STORAGE GROUP root.sgcc
// 删除所有数据，时间序列以及存储组
IoTDB &gt; DELETE STORAGE GROUP 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></div></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/V0.13.x/Operate-Metadata/Storage-Group.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><nav class="vp-page-nav"><!----><a class="route-link nav-link next" href="/zh/UserGuide/V0.13.x/Operate-Metadata/Node.html" aria-label="节点操作"><div class="hint">下一页<span class="arrow end"></span></div><div class="link">节点操作<!----></div></a></nav><!----><!--[--><!----><!--]--><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">rel/0.13</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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