Why don´t you try select TO_DAYS(end_date)-TO_DAYS(start_date) as duration : this will return the difference in days if you need mor accuracy i.e. difference in hours, you should word on a TIMESTAMP 14 instead of date ; this data type holds up to seconds and is mathematically easy to operate ... i hope it helps
----- Original Message ----- From: "Ken Kinder" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 15, 2001 8:32 PM Subject: Subtracting Dates > The date addition and subtraction functions in mysql don't seem to quiet do > this. I was wondering if anyone know a way I could do this in the query: > > Say you have two fields, start_time, and end_time, representing the start and > end of a period of time. Both are datetime datatypes. What I want is the > logical equivalent of: > > select end_time - start_time as duration from .... > > I want the difference between those two, such that it would say "0 days, 4 > hours" or something. > > --------------------------------------------------------------------- > Before posting, please check: > http://www.mysql.com/manual.php (the manual) > http://lists.mysql.com/ (the list archive) > > To request this thread, e-mail <[EMAIL PROTECTED]> > To unsubscribe, e-mail <[EMAIL PROTECTED]> > Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php > --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
