You can't subtract dates like that. You need to use the built in date/time functions. See the following:
http://www.mysql.com/doc/D/a/Date_calculations.html http://www.mysql.com/doc/D/a/Date_and_time_functions.html Your query would be something like this: SELECT TO_DAYS(completion_date) - TO_DAYS(order_date) AS days_elapsed ... --jeff ----- Original Message ----- From: "Brandon McCombs" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, July 13, 2002 8:34 PM Subject: date subtraction error > Hi, > > Maybe I'm missing something but I tried solution someone posted for > someone else's problem concerning finding out # of days between 2 dates. > > I have 2 sets of dates I'm working with in my sample DB. > > order_date completion_date > 2002-07-03 2002-07-09 > and > 2002-06-27 2002-07-08 > > Now the query I'm using is the following: > select (completion_date-order_date) as days_elapsed from received where > completion_date != 0; > > I get the following as a result: > 6 > 81 > > Obviously there isn't 81 days between June 27th and July 8th. Can anyone > tell me why mysql does the calculation this way and if there is a more > correct way of doing the subtraction of the dates? > > Thanks > Brandon > > --------------------------------------------------------------------- > 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
