From: Dani Oderbolz <oderbolz@ecologic.de>
To: pgsql-sql@postgresql.org
Subject: Re: Delete duplicates
Date: Wed, 25 Jun 2003 10:16:35 +0200
Message-ID: <3EF95A63.6070609@ecologic.de> (raw)
In-Reply-To: <00ac01c33946$8d1678e0$0a00000a@neo>
References: <20030622091522.M37248@oasis.net.au>
<2976.200.59.66.253.1056316636.squirrel@webmail.akyasociados.com.ar>
<00ac01c33946$8d1678e0$0a00000a@neo>
Denis Arh wrote:
>How to delete "real" duplicates?
>
>id | somthing
>-----------------------
>1 | aaa
>1 | aaa
>2 | bbb
>2 | bbb
>
>(an accident with backup recovery...)
>
In these cases, its certainly the best to rebuild your table
using a
CREATE TABLE new AS
SELECT col1,col1..
FROM old
GROUPY BY col1,col2...
If you have got many duplicates, recreating a new table
semms better to me than deleteing.
(Another advantage is that you still have the "bad" table as a record).
Cheers,
Dani
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To: pgsql-sql@postgresql.org
Cc: oderbolz@ecologic.de
Subject: Re: Delete duplicates
In-Reply-To: <3EF95A63.6070609@ecologic.de>
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