On Tuesday 04 March 2003 16:51, Jamie Jennings wrote: > Hi. I've got two mediumint columns in a mysql table, > and I'm trying to subtract them like this: > > SELECT column1-column2 FROM table WHERE > name='johndoe'; > > This works some of the time, however, I get weird > results for negative numbers. For example, when > column1=0 and column2=4995, I get: > > 18446744073709546621 > > when really the answer should be -4995.
Is your columns defined as UNSIGNED? In this result of substraction will be unsigned too. -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Victoria Reznichenko / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net <___/ www.mysql.com --------------------------------------------------------------------- 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
