From: Greg Stark <gsstark@mit.edu>
To: Aaron Chu <astrate@mac.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Beginner needs help
Date: 01 Mar 2003 01:22:39 -0500
Message-ID: <873cm7mwr4.fsf@stark.dyndns.tv> (raw)
In-Reply-To: <96853212-4AA9-11D7-8F7C-000393017462@mac.com>
References: <96853212-4AA9-11D7-8F7C-000393017462@mac.com>
Aaron Chu <astrate@mac.com> writes:
> I have a table which has a column of surnames (string) and I would like to know
> how can I retrieve (SELECT) all the repeated surnames, i.e. more than one
> person who has the same surname.
SELECT surname FROM table GROUP BY surname HAVING count(*) > 1
More generally, read up on GROUP BY.
--
greg
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To: pgsql-sql@postgresql.org
Cc: gsstark@mit.edu, astrate@mac.com
Subject: Re: Beginner needs help
In-Reply-To: <873cm7mwr4.fsf@stark.dyndns.tv>
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