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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<meta name="DC.Title" content="Sort sequence and the CREATE INDEX statement" />
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<meta name="abstract" content="Indexes are created using the sort sequence that was in effect when the CREATE INDEX statement was run." />
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<meta name="description" content="Indexes are created using the sort sequence that was in effect when the CREATE INDEX statement was run." />
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<meta name="DC.subject" content="sort sequence, CREATE INDEX, CREATE INDEX statement, statements" />
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<meta name="keywords" content="sort sequence, CREATE INDEX, CREATE INDEX statement, statements" />
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<meta name="DC.Relation" scheme="URI" content="../rzajq/usesortseq.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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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<title>Sort sequence and the CREATE INDEX statement</title>
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</head>
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<body id="rbafyssindex"><a name="rbafyssindex"><!-- --></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">Sort sequence and the CREATE INDEX statement</h1>
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<div><p>Indexes are created using the sort sequence that was in effect
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when the CREATE INDEX statement was run.</p>
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<div class="section"><p>An entry is added to the index every time an insert is made into
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the table over which the index is defined. Index entries contain the weighted
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value for character key, and UCS-2 and UTF-16 graphic key columns. The system
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gets the weighted value by converting the key value based on the sort sequence
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of the index.</p>
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</div>
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<div class="section"><p>When selection is made using that sort sequence and that index,
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the character, or UCS-2 or UTF-16 graphic keys do not need to be converted
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before comparison. This improves the performance of the query. </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="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>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../rzajq/usesortseq.htm">Use indexes with sort sequence</a></div>
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</div>
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</div>
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</body>
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</html> |