75 lines
6.4 KiB
HTML
75 lines
6.4 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 name="DC.Title" content="Perform date, time, and timestamp arithmetic using the Open Query File (OPNQRYF) command" />
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<meta name="abstract" content="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." />
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<meta name="description" content="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." />
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<meta name="DC.subject" content="Open Query File (OPNQRYF) command, using, Date, time, and timestamp arithmetic, OPNQRYF (Open Query File) command, Date, time, and timestamp arithmetic" />
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<meta name="keywords" content="Open Query File (OPNQRYF) command, using, Date, time, and timestamp arithmetic, OPNQRYF (Open Query File) command, Date, time, and timestamp arithmetic" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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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>Perform date, time, and timestamp arithmetic using the Open Query File
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(OPNQRYF) command</title>
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</head>
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<body id="rbafodttaopq"><a name="rbafodttaopq"><!-- --></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">Perform date, time, and timestamp arithmetic using the Open Query File
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(OPNQRYF) command</h1>
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<div><p>Date, time, and timestamp values can be incremented, decremented,
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and subtracted. These operations might involve decimal numbers called <em>durations</em>.
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These topics include a definition of durations and a specification
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of the rules for performing arithmetic operations on date, time, and timestamp
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values.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rbafodttadur.htm">Durations</a></strong><br />
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A <em>duration</em> is a number representing an interval of time.
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This topic introduces various types of durations.</li>
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<li class="ulchildlink"><strong><a href="rbafodttarul.htm">Rules for date, time, and timestamp arithmetic</a></strong><br />
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The only arithmetic operations that can be performed on date and time values are addition and subtraction. If a date or time value is the operand of addition, the other operand must be a duration. This topic describes rules for performing date, time and timestamp arithmetic.</li>
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<li class="ulchildlink"><strong><a href="rbafodsubtr.htm">Subtract dates</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rbafodincr.htm">Increment and decrement dates</a></strong><br />
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The result of adding a duration to a date, or of subtracting a duration from a date, is itself a date.</li>
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<li class="ulchildlink"><strong><a href="rbafotsubtr.htm">Subtract times</a></strong><br />
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The result of subtracting one time (TIME2) from another (TIME1) is a time duration that specifies the number of hours, minutes, and seconds between the two times.</li>
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<li class="ulchildlink"><strong><a href="rbafotincr.htm">Increment and decrement times</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rbafotssubtr.htm">Subtract timestamps</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rbafotsincr.htm">Increment and decrement timestamps</a></strong><br />
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The result of adding a duration to a timestamp, or of subtracting a duration from a timestamp, is itself a timestamp.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafoopnqf.htm" title="The Open Query File (OPNQRYF) command is a control language (CL) command that allows you to perform many data processing functions on database files. These topics discuss how to create a query using the OPNQRYF command, how to specify parameters for its major functions, and how to use it with your high-level language program.">Use 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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