63 lines
3.6 KiB
HTML
63 lines
3.6 KiB
HTML
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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.Type" content="concept" />
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<meta name="DC.Title" content="Fields in join logical files" />
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<meta name="abstract" content="Here are the rules for fields in join logical files." />
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<meta name="description" content="Here are the rules for fields in join logical files." />
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<meta name="DC.subject" content="field, join logical file" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Fields in join logical files</title>
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</head>
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<body id="rbaforjlffjlf"><a name="rbaforjlffjlf"><!-- --></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">Fields in join logical files</h1>
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<div><p>Here are the rules for fields in join logical files.</p>
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<div class="p"><ul><li>Fields in a record format for a join logical file must exist in one of
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the physical files used by the logical file or, if CONCAT, RENAME, TRNTBL,
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or SST is specified for the field, be a result of fields in one of the physical
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files.</li>
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<li>Fields specified as parameter values on the CONCAT keyword must be from
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the same physical file. If the first field name specified on the CONCAT keyword
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is not unique among the physical files, you must specify the JREF keyword
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for that field to identify which file contains the field descriptions you
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want to use.</li>
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<li>If a field name in the record format for a join logical file is specified
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in more than one of the physical files, you must uniquely specify on the JREF
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keyword which file the field comes from.</li>
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<li>Key fields, if specified, must come from the primary file. Key fields
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in the join logical file need not be key fields in the primary file.</li>
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<li>Select/omit fields can come from any physical file used by the join logical
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file, but in some circumstances the DYNSLT keyword is required.</li>
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<li>If specified, key fields and select/omit fields must be defined in the
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record format.</li>
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<li>Relative file numbers must be used for the JOIN and JREF keywords if the
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name of the physical file is specified more than once on the JFILE keyword.</li>
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</ul>
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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="rbafosrjlf.htm" title="This is a summary of rules for joining database files.">Summary of rules</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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