am Tue, dem 26.06.2007, um 10:24:05 +0200 mailte Michael Landin Hostbaek folgendes:
> Hello,
>
> I have a table called tracking, with a contactid varchar, click bool,
> view bool and cid varchar.
>
> I would like to put the following into one single query if possible:
>
> // Number of clicks
> select cid,count(distinct contactid) from tracking where click =
> true group by cid;
>
> // Number of views
> select cid,count(distinct contactid) from tracking where view =
> true group by cid;
>
> I guess I have to put where (click = true or view = true) - and
> differentiate them in the SELECT target.. ?
*untested*
select cid, sum(case when click = true then 1 else 0 end), sum(case when
view = true then 1 else 0 end) from ...
Andreas
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Andreas Kretschmer
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