56 lines
3.5 KiB
HTML
56 lines
3.5 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<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))' />
|
||
|
|
<meta name="DC.Type" content="reference" />
|
||
|
|
<meta name="DC.Title" content="Sort sequence and the CREATE INDEX statement" />
|
||
|
|
<meta name="abstract" content="Indexes are created using the sort sequence that was in effect when the CREATE INDEX statement was run." />
|
||
|
|
<meta name="description" content="Indexes are created using the sort sequence that was in effect when the CREATE INDEX statement was run." />
|
||
|
|
<meta name="DC.subject" content="sort sequence, CREATE INDEX, CREATE INDEX statement, statements" />
|
||
|
|
<meta name="keywords" content="sort sequence, CREATE INDEX, CREATE INDEX statement, statements" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="rbafyussisql.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="../rzajq/usesortseq.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="rbafyssindex" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Sort sequence and the CREATE INDEX statement</title>
|
||
|
|
</head>
|
||
|
|
<body id="rbafyssindex"><a name="rbafyssindex"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Sort sequence and the CREATE INDEX statement</h1>
|
||
|
|
<div><p>Indexes are created using the sort sequence that was in effect
|
||
|
|
when the CREATE INDEX statement was run.</p>
|
||
|
|
<div class="section"><p>An entry is added to the index every time an insert is made into
|
||
|
|
the table over which the index is defined. Index entries contain the weighted
|
||
|
|
value for character key, and UCS-2 and UTF-16 graphic key columns. The system
|
||
|
|
gets the weighted value by converting the key value based on the sort sequence
|
||
|
|
of the index.</p>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>When selection is made using that sort sequence and that index,
|
||
|
|
the character, or UCS-2 or UTF-16 graphic keys do not need to be converted
|
||
|
|
before comparison. This improves the performance of the query. </p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyussisql.htm" title="A sort sequence defines how characters in a character set relate to each other when they are compared or ordered. Normalization allows you to compare strings that contain combining characters.">Sort sequences and normalization in SQL</a></div>
|
||
|
|
</div>
|
||
|
|
<div class="relinfo"><strong>Related information</strong><br />
|
||
|
|
<div><a href="../rzajq/usesortseq.htm">Use indexes with sort sequence</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|