68 lines
4.1 KiB
HTML
68 lines
4.1 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="concept" />
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<meta name="DC.Title" content="Subtract dates" />
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<meta name="abstract" content="The result of subtracting one date (DATE2) from another (DATE1) is a date duration that specifies the number of years, months, and days between the two dates." />
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<meta name="description" content="The result of subtracting one date (DATE2) from another (DATE1) is a date duration that specifies the number of years, months, and days between the two dates." />
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<meta name="DC.subject" content="arithmetic operations using OPNQRYF command, date, arithmetic using OPNQRYF command" />
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<meta name="keywords" content="arithmetic operations using OPNQRYF command, date, arithmetic using OPNQRYF command" />
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<meta name="DC.Relation" scheme="URI" content="rbafodttaopq.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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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbafodsubtr" />
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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>Subtract dates</title>
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</head>
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<body id="rbafodsubtr"><a name="rbafodsubtr"><!-- --></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">Subtract dates</h1>
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<div><p>The result of subtracting one date (DATE2) from another (DATE1)
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is a date duration that specifies the number of years, months, and days between
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the two dates.</p>
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<div class="p">The data type of the result is DECIMAL(8,0). If DATE1 is greater than or
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equal to DATE2, DATE2 is subtracted from DATE1. If DATE1 is less than DATE2,
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however, DATE1 is subtracted from DATE2, and the sign of the result is made
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negative. The following procedural description clarifies the
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steps involved in the operation RESULT = DATE1 - DATE2. <div class="fignone"><p>If %DAY(DATE2) <= %DAY(DATE1) ; <br />
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then %DAY(RESULT) = %DAY(DATE1) - %DAY(DATE2).<br />
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<br />
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If %DAY(DATE2) > %DAY(DATE1) ;<br />
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then %DAY(RESULT) = N + %DAY(DATE1) - %DAY(DATE2) ;<br />
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where N = the last day of %MONTH(DATE2). ;<br />
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%MONTH(DATE2) is then incremented by 1.<br />
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<br />
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If %MONTH(DATE2) <= %MONTH(DATE1) ;<br />
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then %MONTH(RESULT) = %MONTH(DATE1) - %MONTH(DATE2).<br />
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<br />
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If %MONTH(DATE2) > %MONTH(DATE1) ;<br />
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then %MONTH(RESULT) = 12 + %MONTH(DATE1) - %MONTH(DATE2). ;<br />
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%YEAR(DATE2) is then incremented by 1.<br />
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<br />
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%YEAR(RESULT) = %YEAR(DATE1) - %YEAR(DATE2).<br />
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</p>
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</div>
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</div>
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<p>For example, the result of %DATE('3/15/2000') - '12/31/1999' is 215 (or,
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a duration of 0 years, 2 months, and 15 days).</p>
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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="rbafodttaopq.htm" title="Date, time, and timestamp values can be incremented, decremented, and subtracted. These operations might involve decimal numbers called durations. These topics include a definition of durations and a specification of the rules for performing arithmetic operations on date, time, and timestamp values.">Perform date, time, and timestamp arithmetic using the Open Query File (OPNQRYF) command</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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