HOWTO: How to Add or Subtract Time with a DateTime Data Type

Last reviewed: November 11, 1997
Article ID: Q176043
The information in this article applies to:
  • Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b,5.0, 5.0a
  • Microsoft Visual FoxPro for Macintosh, version 3.0b

SUMMARY

This article describes how to add or subtract time with a DateTime field. Time, in seconds, can be added or subtracted with a DateTime data type field. Time carries over from seconds to minutes to hours to days and to years. There are no adjustments in this sample for a leap year. This is an example and you may want to add additional functionality if time calculations are a large part of your application.

MORE INFORMATION

When you add or subtract time with a DateTime field, the value(s) to add or subtract will be calculated with seconds.

Example to add an hour:

   HourFromNow = Datetime() + 3600

-or-

Example to subtract a week:

   WeekAgo = Datetime() – (7*24*3600)


Additional query words: datetime day hour minute second hh:mm:ss
(c) Microsoft Corporation, 1997, All Rights Reserved. Contributions by
Mike Fernald,
Microsoft Corporation
Keywords : VFoxMac vfoxwin
Version : MACINTOSH:3.0b; WINDOWS:3.0,3.0b,5.0,5.0a
Platform : MACINTOSH WINDOWS
Issue type : kbhowto


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Last reviewed: November 11, 1997
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