Question

Date arithmetic

Asked by: dds_felles

How do I add or subtract a non-integer number of days from a datetime value using DataWindow day, date and time functions?
For example:
Subtracting 0.75 days from 17-MAR-2008 00:00 yields 16-MAR-2008 06:00
First thought was to use RelativeDate() but this reguires an integer number of days.
Second thought was to convert the non-integer days to hours and then use ReleativeTime() but this only works within a 24-hour period.

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Asked On
2009-08-28 at 02:45:55ID24689226
Tags

PowerBuilder

Topic

PowerBuilder Programming Language

Participating Experts
2
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Answers

 

by: shru_0409Posted on 2009-08-28 at 04:39:32ID: 25206500

could to give the sample data than i can help u

 

by: Vikas_DixitPosted on 2009-08-31 at 09:31:35ID: 25224156

Look at the PFC service n_cst_datetime. It has a function of_RelativeDatetime.
All you will need to do is convert your partial days into seconds, and pass. If you don't have PFC source, you could download it from sybase website, or find it with your PB installation.


//      Function:              of_RelativeDatetime
//
//      Access:              public
//
//      Arguments:
//      adtm_start             Starting datetime point of calculation.
//      al_offset           Number of seconds before/after datetime to be returned.
//
//      Returns:                   Datetime
//                                    Relative datetime.
//                                    If any argument's value is NULL, function returns NULL.
//                                    If any argument's value is Invalid, function returns 1900-01-01.
//
//      Description:        Given a datetime, find the relative datetime +/- n seconds

 

by: dds_fellesPosted on 2009-09-01 at 00:38:32ID: 25229257

Exactly what I needed. Thanks.

20120131-EE-VQP-002

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