From: Richard Broersma <richard.broersma@gmail.com>
To: Rob Sargent <robjsargent@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: left outer join on more than 2 tables?
Date: Tue, 16 Jun 2009 15:50:21 -0700
Message-ID: <396486430906161550v30befebelcfddd58ebc4b4f2d@mail.gmail.com> (raw)
In-Reply-To: <4A38114B.7090106@gmail.com>
References: <4A3807CF.90109@consumercontact.com>
<396486430906161425i1cb7949enff5443cc2043805a@mail.gmail.com>
<4A38114B.7090106@gmail.com>
On Tue, Jun 16, 2009 at 2:40 PM, Rob Sargent<robjsargent@gmail.com> wrote:
> Is there a city without a reference to region?
I don't know, but the OP wanted to know complaints by region.
> And wouldn't you want to count(cm.id)?
Count(cm.id) and Count(*) produce the same result. But I like
Count(*) more since it helps to correctly express the idea that we are
counting rows per group and not cm.id(s) per group.
--
Regards,
Richard Broersma Jr.
Visit the Los Angeles PostgreSQL Users Group (LAPUG)
http://pugs.postgresql.org/lapug
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To: pgsql-sql@postgresql.org
Cc: richard.broersma@gmail.com, robjsargent@gmail.com
Subject: Re: left outer join on more than 2 tables?
In-Reply-To: <396486430906161550v30befebelcfddd58ebc4b4f2d@mail.gmail.com>
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