id is the primary key. There are no entries in the DB where id=NULL
Cheers,
Rich
> -----Original Message-----
> From: Brian Reichert [mailto:reichert@stripped]
> Sent: Tuesday, September 17, 2002 12:16 PM
> To: Richard Unger
> Cc: mysql@stripped
> 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 <reichert@stripped>
> 37 Crystal Ave. #303 Daytime number: (603) 434-6842
> Derry NH 03038-1713 USA Intel
> architecture: the left-hand path
>
