From: Christoph Haller <ch@rodos.fzk.de>
To: dave-ml@dribin.org
To: pgsql-sql@postgresql.org
Subject: Re: One to many query question
Date: Thu, 31 Jul 2003 09:42:48 +0200
Message-ID: <3F28C878.EE2EB806@rodos.fzk.de> (raw)
>
> On Wed, Jul 30, 2003 at 05:26:23PM -0400, Dmitry Tkach wrote:
> > >How do I write a query to find all CDs that are NOT Rock?
> > >
> > What about
> > select * from cd where not exists (select 1 from cd_genres where
cd_id
> > = cd.id and genre='Rock')?
>
> Thanks everyone! This did indeed work, and it does seem clearer. I
> never knew about EXISTS before. How portable is this? I'm interested
> in supporting PostgreSQL and MS SQL Server for now, and possibly
> Oracle and MySQL in the future.
>
It should be portable completely. It's SQL standard.
Regards, Christoph
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To: pgsql-sql@postgresql.org
Cc: ch@rodos.fzk.de, dave-ml@dribin.org
Subject: Re: One to many query question
In-Reply-To: <3F28C878.EE2EB806@rodos.fzk.de>
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