From: Tomasz Myrta <jasiek@klaster.net>
To: Aaron Chu <astrate@mac.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Beginner needs help
Date: Sun, 02 Mar 2003 19:00:55 +0100
Message-ID: <3E6246D7.8030804@klaster.net> (raw)
References: <96853212-4AA9-11D7-8F7C-000393017462@mac.com>
Aaron Chu wrote:
>Hi,
>
>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.
>Thanks.
What exactly you want to do? To eliminate duplicates? Use then:
select surname from users group by surname;
Maybe you want to know which surnames are duplicated? Use then:
select surname from users group by surname having count(*)>1
Regards,
Tomasz Myrta
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Subject: Re: Beginner needs help
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