54 lines
3.1 KiB
HTML
54 lines
3.1 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="Example: AVG over a UDT" />
|
|
<meta name="abstract" content="This example implements the AVG column function over the CANADIAN_DOLLAR distinct type." />
|
|
<meta name="description" content="This example implements the AVG column function over the CANADIAN_DOLLAR distinct type." />
|
|
<meta name="DC.subject" content="examples, AVG over a UDT, CREATE FUNCTION statement, AVG over a UDT example" />
|
|
<meta name="keywords" content="examples, AVG over a UDT, CREATE FUNCTION statement, AVG over a UDT example" />
|
|
<meta name="DC.Relation" scheme="URI" content="rbafyudfdudf.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="rbafyudfcfx5" />
|
|
<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>Example: AVG over a UDT</title>
|
|
</head>
|
|
<body id="rbafyudfcfx5"><a name="rbafyudfcfx5"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Example: AVG over a UDT</h1>
|
|
<div><p>This example implements the AVG column function over the CANADIAN_DOLLAR
|
|
distinct type.</p>
|
|
<div class="section"><p>Strong
|
|
typing prevents you from using the built-in AVG function on a distinct type.
|
|
It turns out that the source type for CANADIAN_DOLLAR was DECIMAL, and so
|
|
you implement the AVG by sourcing it on the AVG(DECIMAL) built-in function.</p>
|
|
<pre> <strong>CREATE FUNCTION</strong> AVG (CANADIAN_DOLLAR)
|
|
<strong>RETURNS</strong> CANADIAN_DOLLAR
|
|
<strong>SOURCE</strong> "QSYS2".<strong>AVG</strong>(<strong>DECIMAL</strong>(9,2))</pre>
|
|
</div>
|
|
<div class="section"><p>Note that in the SOURCE clause you have qualified the function
|
|
name, just in case there might be some other AVG function lurking in your
|
|
SQL path. </p>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyudfdudf.htm" title="A UDF must be registered in the database before the function can be recognized and used by SQL.">Register UDFs</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |