55 lines
3.9 KiB
HTML
55 lines
3.9 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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<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="Database design" />
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<meta name="abstract" content="Use the following topics to determine what tables you require in your database and to understand the relationship between those tables." />
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<meta name="description" content="Use the following topics to determine what tables you require in your database and to understand the relationship between those tables." />
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<meta name="DC.Relation" scheme="URI" content="rzaiksqlperf.htm" />
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<meta name="DC.Relation" scheme="URI" content="normalization.htm" />
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<meta name="DC.Relation" scheme="URI" content="tablesize.htm" />
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<meta name="DC.Relation" scheme="URI" content="indexes.htm" />
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<meta name="DC.Relation" scheme="URI" content="matchattrjoinfld.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="dbdesign" />
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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>Database design</title>
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</head>
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<body id="dbdesign"><a name="dbdesign"><!-- --></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">Database design</h1>
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<div><p>Use the following topics to determine what tables you require in
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your database and to understand the relationship between those tables.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="normalization.htm">Normalization</a></strong><br />
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Several available design methods allow you to design technically correct databases, and effective relational database structure. Some of these methods are based on a design approach called normalization. Normalization refers to the reduction or elimination of storing redundant data.</li>
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<li class="ulchildlink"><strong><a href="tablesize.htm">Table size</a></strong><br />
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The size of the tables that your application program accesses has a significant impact on the performance of the application program.</li>
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<li class="ulchildlink"><strong><a href="indexes.htm">Use indexes</a></strong><br />
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The use of indexes can improve significantly the performance of your applications.</li>
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<li class="ulchildlink"><strong><a href="matchattrjoinfld.htm">Match attributes of join fields</a></strong><br />
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Columns in tables that are joined should have identical attributes: the same column length, same data type (character, numeric), and so forth. Nonidentical attributes result in temporary indexes being built, even though indexes over corresponding columns may exist.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiksqlperf.htm" title="Good application design includes the efficient use of machine resources. To run in a manner that is acceptable to the end user, an application program must be efficient in operation, and must run with adequate response time.">SQL performance</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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