From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-sql@postgresql.org
Cc: Michael Landin Hostbaek <mich@the-lab.org>
Subject: Re: Where clause
Date: Tue, 26 Jun 2007 11:01:40 +0200
Message-ID: <20070626090140.GB28610@a-kretschmer.de> (raw)
In-Reply-To: <20070626082405.GA67974@mich2.itxmarket.com>
References: <20070626082405.GA67974@mich2.itxmarket.com>
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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To: pgsql-sql@postgresql.org
Cc: andreas.kretschmer@schollglas.com, mich@the-lab.org
Subject: Re: Where clause
In-Reply-To: <20070626090140.GB28610@a-kretschmer.de>
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