56 lines
3.5 KiB
HTML
56 lines
3.5 KiB
HTML
<?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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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Add a column" />
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<meta name="abstract" content="When you add a new column to a table, the column is initialized with its default value for all existing rows. If NOT NULL is specified, a default value must also be specified." />
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<meta name="description" content="When you add a new column to a table, the column is initialized with its default value for all existing rows. If NOT NULL is specified, a default value must also be specified." />
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<meta name="DC.subject" content="ALTER TABLE statement, adding a column, column, adding" />
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<meta name="keywords" content="ALTER TABLE statement, adding a column, column, adding" />
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<meta name="DC.Relation" scheme="URI" content="rbafyalter.htm" />
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<meta name="DC.Relation" scheme="URI" content="../db2/rbafzmstatabl.htm" />
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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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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbafyaddcol" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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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>Add a column</title>
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</head>
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<body id="rbafyaddcol"><a name="rbafyaddcol"><!-- --></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">Add a column</h1>
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<div><p>When you add a new column to a table, the column is initialized
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with its default value for all existing rows. If NOT NULL is specified, a
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default value must also be specified. </p>
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<div class="section"><p>You can add a column to a table using the ADD COLUMN clause of
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the SQL ALTER TABLE statement. </p>
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</div>
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<div class="section"><p>The altered table may consist of up to 8000 columns. The sum
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of the byte counts of the columns must not be greater than 32766 or, if a
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VARCHAR or VARGRAPHIC column is specified, 32740. If a LOB column is specified,
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the sum of record data byte counts of the columns must not be greater than
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15 728 640.</p>
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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="rbafyalter.htm" title="Changing the definition of a table allows you to add new columns, change an existing column definition (change its length, default value, and so on), drop existing columns, and add and remove constraints.">Change a table definition</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../db2/rbafzmstatabl.htm">ALTER TABLE</a></div>
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</div>
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</div>
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</body>
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</html> |