53 lines
3.8 KiB
HTML
53 lines
3.8 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 http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Increment and decrement times" />
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<meta name="abstract" content="The result of adding a duration to a time, or of subtracting a duration from a time, is itself a time. Any overflow or underflow of hours is discarded, thereby ensuring that the result is always a time." />
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<meta name="description" content="The result of adding a duration to a time, or of subtracting a duration from a time, is itself a time. Any overflow or underflow of hours is discarded, thereby ensuring that the result is always a time." />
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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="rbafotincr" />
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<meta name="DC.Language" content="en-us" />
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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>Increment and decrement times</title>
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</head>
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<body id="rbafotincr"><a name="rbafotincr"><!-- --></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">Increment and decrement times</h1>
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<div><p>The result of adding a duration to a time, or of subtracting a
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duration from a time, is itself a time. Any overflow or underflow of hours
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is discarded, thereby ensuring that the result is always a time. </p>
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<p> If a duration of hours is added or subtracted, only the hours portion
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of the time is affected. The minutes and seconds are unchanged.</p>
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<p>Similarly, if a duration of minutes is added or subtracted, only minutes
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and, if necessary, hours are affected. The seconds portion of the time is
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unchanged.</p>
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<p>Adding or subtracting a duration of seconds, of course, affects
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the seconds portion of the time, and potentially the minutes and hours.</p>
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<p>Time durations, whether positive or negative, also can be added to and
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subtracted from times. The result is a time that has been incremented or decremented
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by the specified number of hours, minutes, and seconds, in that order.<samp class="codeph">TIME1
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+ X</samp>, where <samp class="codeph">X</samp> is a DECIMAL(6,0) number, is equivalent
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to the expression: TIME1 + %DURHOUR(%HOUR(X)) + %DURMINUTE(%MINUTE(X)) + %DURSEC(%SECOND(X))</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> |