66 lines
4.3 KiB
HTML
66 lines
4.3 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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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Subtract timestamps" />
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<meta name="abstract" content="The result of subtracting one timestamp (TS2) from another (TS1) is a timestamp duration that specifies the number of years, months, days, hours, minutes, seconds, and microseconds between the two timestamps." />
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<meta name="description" content="The result of subtracting one timestamp (TS2) from another (TS1) is a timestamp duration that specifies the number of years, months, days, hours, minutes, seconds, and microseconds between the two timestamps." />
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<meta name="DC.subject" content="arithmetic operations using OPNQRYF command, timestamp, arithmetic using OPNQRYF command" />
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<meta name="keywords" content="arithmetic operations using OPNQRYF command, timestamp, 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="rbafotssubtr" />
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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 timestamps</title>
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</head>
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<body id="rbafotssubtr"><a name="rbafotssubtr"><!-- --></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 timestamps</h1>
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<div><p>The result of subtracting one timestamp (TS2) from another (TS1)
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is a timestamp duration that specifies the number of years, months, days,
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hours, minutes, seconds, and microseconds between the two timestamps. </p>
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<div class="p">The data type of the result is DECIMAL(20,6). If TS1 is greater than or
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equal to TS2, TS2 is subtracted from TS1. If TS1 is less than TS2, however,
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TS1 is subtracted from TS2 and the sign of the result is made negative. The
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following procedural description clarifies the steps involved in the operation
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RESULT = TS1 - TS2: <p>If %MICSEC(TS2) <= %MICSEC(TS1) ; <br />
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then %MICSEC(RESULT) = %MICSEC(TS1) - ; <br />
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%MICSEC(TS2).<br />
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<br />
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If %MICSEC(TS2) > %MICSEC(TS1) ; <br />
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then %MICSEC(RESULT) = 1000000 + ; <br />
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%MICSEC(TS1) - %MICSEC(TS2) ; <br />
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and %SECOND(TS2) is incremented by 1.</p>
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The seconds and minutes part
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of the timestamps are subtracted as specified in the rules for subtracting
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times: <p>If %HOUR(TS2) <= %HOUR(TS1) ; <br />
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then %HOUR(RESULT) = %HOUR(TS1) - %HOUR(TS2).<br />
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<br />
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If %HOUR(TS2) > %HOUR(TS1) ; <br />
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then %HOUR(RESULT) = 24 + %HOUR(TS1) - %HOUR(TS2) ; <br />
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and %DAY(TS2) is incremented by 1.</p>
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</div>
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<p>The date part of the timestamp is subtracted as specified in the rules
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for subtracting dates.</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> |