| From: | Achilleas Mantzios <achill(at)matrix(dot)gatewaynet(dot)com> |
|---|---|
| To: | Michael Landin Hostbaek <mich(at)the-lab(dot)org>, "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>, pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: Where clause |
| Date: | 2007-06-26 10:31:03 |
| Message-ID: | 200706261331.04033.achill@matrix.gatewaynet.com |
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| Lists: | pgsql-sql |
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
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