From: Antti Linno <alligator@all.ee>
To: pgsql-sql@postgresql.org
Subject: LEFT JOIN
Date: Tue, 4 Jul 2000 15:15:14 +0300 (EEST)
Message-ID: <Pine.LNX.4.04.10007041506580.27952-100000@all.ee> (raw)
Greetings.
I have a problem. I have 2 tables. E.g. work and workers. I want to
select records, that 1st table has, and the second hasn't(both have id
attribute). I mean I can't do it with is NULL, because those records don't
exist. I was shown, how it is done with mysql
select first.id,second.id_first
from first left join second on
id=id_first where id_first is NULL;
but when I tried it in psql, it said, not implemented.
Antti
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Subject: Re: LEFT JOIN
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