Στις Τρίτη 26 Ιούνιος 2007 12:44, ο/η Michael Landin Hostbaek έγραψε:
> A. Kretschmer (andreas.kretschmer) writes:
> > *untested*
> >
> > select cid, sum(case when click = true then 1 else 0 end), sum(case when
> > view = true then 1 else 0 end) from ...
>
> Thanks, but I need the DISTINCT contactid - I don't want the same
> contactid counted twice.
>
Something like
SELECT distinct cid,(select count(distinct t1.contactid) from tracking t1
where t1.view and t1.cid=tglob.cid) as countviews,(select count(distinct
t2.contactid) from tracking t2 where t2.click and t2.cid=tglob.cid) as
countclicks from tracking tglob;
?
> Mike
>
> ---------------------------(end of broadcast)---------------------------
> TIP 6: explain analyze is your friend
--
Achilleas Mantzios