From: Andreas Kretschmer <akretschmer@spamfence.net>
To: pgsql-sql@postgresql.org
Subject: Re: selecting rows tagged with "a" but not "b"
Date: Mon, 1 Feb 2010 15:14:53 +0100
Message-ID: <20100201141453.GA8857@tux> (raw)
In-Reply-To: <11366-1265031099-334353@sneakemail.com>
References: <11366-1265031099-334353@sneakemail.com>
8q5tmkyqry@sneakemail.com <8q5tmkyqry@sneakemail.com> wrote:
> Hi,
>
> I have a two tables:
>
> article
> articleID, name, content
>
> tags
> articleID, tag
>
> I want to find all articles that are tagged with "a" but not "b"
>
> how do I do this?
select a.* from article left join tags t on a.articleID=t.articleID where b.tag = 'a';
Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect. (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly." (unknown)
Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°
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To: pgsql-sql@postgresql.org
Cc: akretschmer@spamfence.net
Subject: Re: selecting rows tagged with "a" but not "b"
In-Reply-To: <20100201141453.GA8857@tux>
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