103 lines
6.1 KiB
HTML
103 lines
6.1 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Get catalog information about a column" />
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<meta name="abstract" content="The SYSCOLUMNS view contains a row for each column of every table and view in the schema." />
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<meta name="description" content="The SYSCOLUMNS view contains a row for each column of every table and view in the schema." />
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<meta name="DC.subject" content="examples, catalog, getting column information, getting information about, column, getting catalog information about" />
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<meta name="keywords" content="examples, catalog, getting column information, getting information about, column, getting catalog information about" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Get catalog information about a column</title>
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</head>
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<body id="rbafycatcol"><a name="rbafycatcol"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Get catalog information about a column</h1>
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<div><p>The SYSCOLUMNS view contains a row for each column
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of every table and view in the schema.</p>
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<div class="section"><p>The following sample statement displays all the column names in
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the CORPDATA.DEPARTMENT table: </p>
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<pre> <strong>SELECT</strong> *
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<strong>FROM</strong> CORPDATA.SYSCOLUMNS
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<strong>WHERE</strong> TABLE_NAME = 'DEPARTMENT'</pre>
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<p>The result of the
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previous sample statement is a row of information for each column in the table.
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Some of the information is not visible because the width of the information
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is wider than the display screen.</p>
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</div>
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<div class="section"><p>For more information about each column, specify a select-statement
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like this: </p>
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<pre> <strong>SELECT</strong> COLUMN_NAME, TABLE_NAME, DATA_TYPE, LENGTH, HAS_DEFAULT
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<strong>FROM</strong> CORPDATA.SYSCOLUMNS
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<strong>WHERE</strong> TABLE_NAME = 'DEPARTMENT'</pre>
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</div>
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<div class="section"><p>In addition to the column name for each column, the select-statement
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shows: </p>
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<ul><li>The name of the table that contains the column</li>
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<li>The data type of the column</li>
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<li>The length attribute of the column</li>
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<li>If the column allows default values</li>
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</ul>
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</div>
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<div class="section"><p>The result looks like this:</p>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="1" rules="all"><thead align="left"><tr><th align="left" valign="bottom" width="24.274406332453825%" id="d0e83">COLUMN_NAME</th>
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<th align="left" valign="bottom" width="20.052770448548813%" id="d0e85">TABLE_NAME</th>
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<th align="left" valign="bottom" width="16.886543535620053%" id="d0e87">DATA_TYPE</th>
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<th align="center" valign="bottom" width="15.03957783641161%" id="d0e89">LENGTH</th>
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<th align="center" valign="bottom" width="23.7467018469657%" id="d0e91">HAS_DEFAULT</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="24.274406332453825%" headers="d0e83 ">DEPTNO</td>
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<td align="left" valign="top" width="20.052770448548813%" headers="d0e85 ">DEPARTMENT</td>
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<td align="left" valign="top" width="16.886543535620053%" headers="d0e87 ">CHAR</td>
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<td align="center" valign="top" width="15.03957783641161%" headers="d0e89 "> 3</td>
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<td align="center" valign="top" width="23.7467018469657%" headers="d0e91 ">N</td>
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</tr>
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<tr><td align="left" valign="top" width="24.274406332453825%" headers="d0e83 ">DEPTNAME</td>
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<td align="left" valign="top" width="20.052770448548813%" headers="d0e85 ">DEPARTMENT</td>
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<td align="left" valign="top" width="16.886543535620053%" headers="d0e87 ">VARCHAR</td>
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<td align="center" valign="top" width="15.03957783641161%" headers="d0e89 ">29</td>
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<td align="center" valign="top" width="23.7467018469657%" headers="d0e91 ">N</td>
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</tr>
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<tr><td align="left" valign="top" width="24.274406332453825%" headers="d0e83 ">MGRNO</td>
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<td align="left" valign="top" width="20.052770448548813%" headers="d0e85 ">DEPARTMENT</td>
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<td align="left" valign="top" width="16.886543535620053%" headers="d0e87 ">CHAR</td>
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<td align="center" valign="top" width="15.03957783641161%" headers="d0e89 "> 6</td>
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<td align="center" valign="top" width="23.7467018469657%" headers="d0e91 ">Y</td>
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</tr>
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<tr><td align="left" valign="top" width="24.274406332453825%" headers="d0e83 ">ADMRDEPT</td>
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<td align="left" valign="top" width="20.052770448548813%" headers="d0e85 ">DEPARTMENT</td>
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<td align="left" valign="top" width="16.886543535620053%" headers="d0e87 ">CHAR</td>
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<td align="center" valign="top" width="15.03957783641161%" headers="d0e89 "> 3</td>
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<td align="center" valign="top" width="23.7467018469657%" headers="d0e91 ">N</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>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafydbcat.htm" title="A catalog is automatically created when you create a schema. There is also a system-wide catalog that is always in the QSYS2 library.">Catalogs in database design</a></div>
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</div>
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</div>
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</body>
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</html>
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