id is the primary key. There are no entries in the DB where id=NULL Cheers, Rich
> -----Original Message----- > From: Brian Reichert [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, September 17, 2002 12:16 PM > To: Richard Unger > Cc: [EMAIL PROTECTED] > Subject: Re: aggregate functions producing bad data > > > On Tue, Sep 17, 2002 at 11:59:42AM -0700, Richard Unger wrote: > > My query: > > > > SELECT > > count(id), > > count( IF(call_end - call_start > 5, id, NULL) ), > > count( IF(call_end - call_start <= 5, id, NULL) ) > > FROM > > t_calllog_calls; > > > > My result: > > > > 1994 > > 1956 > > 35 > > > > However, 1956 + 35 != 1994. > > > > Running MySQL 3.23.49-nt > > One thing I'd check: what happens if t_calllog_calls.id is NULL? > > > Cheers, > > Rich > > -- > Brian 'you Bastard' Reichert <[EMAIL PROTECTED]> > 37 Crystal Ave. #303 Daytime number: (603) 434-6842 > Derry NH 03038-1713 USA Intel > architecture: the left-hand path > --------------------------------------------------------------------- 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
