List:General Discussion« Previous MessageNext Message »
From:mtoth Date:September 17 2002 7:38pm
Subject:RE: aggregate functions producing bad data
View as plain text  
what does
  Select count(id) from t_calllog_calls where id IS NULL
give you?


On Tue, 17 Sep 2002, Richard Unger wrote:

> That would just give me 1994 for all 3 columns of output.  What I want to know is how
> many calls were longer than 5 seconds, how many were <= 5 seconds, and the total number
> of calls.
>
> Cheers,
> Rich
>
>
> > -----Original Message-----
> > From: Gelu Gogancea [mailto:ggelu@stripped]
> > Sent: Tuesday, September 17, 2002 12:08 PM
> > To: Richard Unger; mysql@stripped
> > Subject: Re: aggregate functions producing bad data
> >
> >
> > Hi,
> > I think you should try to use 0 instead of NULL
> >
> > Regards,
> >
> > Gelu
> > _____________________________________________________
> > G.NET SOFTWARE COMPANY
> >
> > Permanent e-mail address : gg@stripped
> >                                           gelugogancea@stripped
> > ----- Original Message -----
> > From: "Richard Unger" <runger@stripped>
> > To: <mysql@stripped>
> > Sent: Tuesday, September 17, 2002 9:59 PM
> > Subject: aggregate functions producing bad data
> >
> >
> > 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
> >
> > Cheers,
> > Rich
> >
> > ---------------------------------------------------------------------
> > 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 <mysql-thread119848@stripped>
> > To unsubscribe, e-mail
> > <mysql-unsubscribe-ggelu=arctic.ro@stripped>
> > 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 <mysql-thread119852@stripped>
> To unsubscribe, e-mail <mysql-unsubscribe-mtoth=queldor.com@stripped>
> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
>
>

Thread
aggregate functions producing bad dataRichard Unger17 Sep
  • Re: aggregate functions producing bad dataBrian Reichert17 Sep
    • Re: aggregate functions producing bad dataDan Nelson17 Sep
  • Re: aggregate functions producing bad dataGelu Gogancea17 Sep
  • Re: aggregate functions producing bad dataGelu Gogancea17 Sep
    • Re: aggregate functions producing bad datamtoth18 Sep
  • Re: aggregate functions producing bad dataGelu Gogancea17 Sep
RE: aggregate functions producing bad dataRichard Unger17 Sep
RE: aggregate functions producing bad dataRichard Unger17 Sep
  • RE: aggregate functions producing bad datamtoth17 Sep
RE: aggregate functions producing bad dataRichard Unger17 Sep
  • Re: aggregate functions producing bad dataJay17 Sep
    • re: Re: aggregate functions producing bad dataVictoria Reznichenko18 Sep
RE: aggregate functions producing bad dataRichard Unger17 Sep
RE: aggregate functions producing bad dataRichard Unger17 Sep
  • Re: aggregate functions producing bad dataBenjamin Pflugmann18 Sep
RE: aggregate functions producing bad dataGerben Gieling18 Sep