Re: [SQL] Duplicate rows

From: Oleg Broytmann <phd(at)comus(dot)ru>
To: Andy Lewis <alewis(at)mpsi(dot)net>
Cc: pgsql-sql(at)postgreSQL(dot)org
Subject: Re: [SQL] Duplicate rows
Date: 1998-05-16 09:31:32
Message-ID: Pine.LNX.3.96.SK.980516132904.20715B-100000@torus.comus.ru
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Hello.

On Fri, 15 May 1998, Andy Lewis wrote:
> I have a postgres db with at least 1000 rows in it. I'd like to know if its
> possible to detect duplicate values of a column if I don't know which values
> that are dups?

Try to create UNIQUE index on a problematic column. If creating the
unique index failes - there are duplicates (providing that creating the
index wouldn't fail by other reasons - disk full, memory shortage, etc.)

Oleg.
----
Oleg Broytmann http://members.tripod.com/~phd2/ phd2(at)earthling(dot)net
Programmers don't die, they just GOSUB without RETURN.

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