forked from docs/doc-exports
Su, Xiaomeng
76a5b1ee83
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com> Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
49 lines
5.0 KiB
HTML
49 lines
5.0 KiB
HTML
<a name="dli_08_0093"></a><a name="dli_08_0093"></a>
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<h1 class="topictitle1">Viewing All Columns in a Specified Table</h1>
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<div id="body8662426"><div class="section" id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_s9319fc0162fc4fad8ceb623357abd2c6"><h4 class="sectiontitle">Function</h4><p id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_aa9338ac22eb24191b6861581fb426e33">This statement is used to query all columns in a specified table.</p>
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</div>
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<div class="section" id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_s501397eb20614e5697770863e9a79506"><h4 class="sectiontitle">Syntax</h4><div class="codecoloring" codetype="Sql" id="dli_08_0093__en-us_topic_0114776187_screen125193155369"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SHOW</span><span class="w"> </span><span class="n">COLUMNS</span><span class="w"> </span><span class="err">{</span><span class="k">FROM</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">IN</span><span class="err">}</span><span class="w"> </span><span class="k">table_name</span><span class="w"> </span><span class="p">[</span><span class="err">{</span><span class="k">FROM</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">IN</span><span class="err">}</span><span class="w"> </span><span class="n">db_name</span><span class="p">];</span>
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</pre></div></td></tr></table></div>
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</div>
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</div>
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<div class="section" id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_s9efebf7e28f54c3b9f13e799dfc94846"><h4 class="sectiontitle">Keywords</h4><ul id="dli_08_0093__ul321118143916"><li id="dli_08_0093__li1721241415912"> COLUMNS: columns in the current table</li><li id="dli_08_0093__li221231416916">FROM/IN: followed by the name of a database whose tables and views will be displayed. Keyword FROM is equivalent to IN. You can use either of them in a statement. </li></ul>
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</div>
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<div class="section" id="dli_08_0093__en-us_topic_0114776170_section1130610201331"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="dli_08_0093__en-us_topic_0114776170_table137579239220" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameters</caption><thead align="left"><tr id="dli_08_0093__en-us_topic_0114776170_row17564232219"><th align="left" class="cellrowborder" valign="top" width="15.83%" id="mcps1.3.4.2.2.3.1.1"><p id="dli_08_0093__en-us_topic_0114776170_p3756152318220">Parameter</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="84.17%" id="mcps1.3.4.2.2.3.1.2"><p id="dli_08_0093__en-us_topic_0114776170_p167561023629">Description</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="dli_08_0093__en-us_topic_0114776170_row1375611231219"><td class="cellrowborder" valign="top" width="15.83%" headers="mcps1.3.4.2.2.3.1.1 "><p id="dli_08_0093__en-us_topic_0114776170_p107564232216">table_name</p>
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</td>
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<td class="cellrowborder" valign="top" width="84.17%" headers="mcps1.3.4.2.2.3.1.2 "><p id="dli_08_0093__en-us_topic_0114776170_p1575614231121">Table name</p>
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</td>
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</tr>
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<tr id="dli_08_0093__row31536117568"><td class="cellrowborder" valign="top" width="15.83%" headers="mcps1.3.4.2.2.3.1.1 "><p id="dli_08_0093__p20153513565">db_name</p>
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</td>
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<td class="cellrowborder" valign="top" width="84.17%" headers="mcps1.3.4.2.2.3.1.2 "><p id="dli_08_0093__p176122570013">Database name</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_s2cf043c0255b466e879f8e14a49dcfbb"><h4 class="sectiontitle">Precautions</h4><p id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_en-us_topic_0047959832_p258841651696">The specified table must exist in the database. If the table does not exist, an error is reported. </p>
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</div>
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<div class="section" id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_s8a8752c5c109411e9b9da6f840ade9e0"><h4 class="sectiontitle">Example</h4><p id="dli_08_0093__en-us_topic_0114776187_en-us_topic_0093946896_a43bc7f2de70e4caa86c1409bbb6ea3b1">Run the following statement to view all columns in the <strong id="dli_08_0093__b347117118317">student</strong> table.</p>
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<div class="codecoloring" codetype="Sql" id="dli_08_0093__en-us_topic_0114776187_screen184882953612"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SHOW</span><span class="w"> </span><span class="n">COLUMNS</span><span class="w"> </span><span class="k">IN</span><span class="w"> </span><span class="n">student</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dli_08_0089.html">Viewing Tables</a></div>
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</div>
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</div>
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