query for non-unique values?

From: "Andy Kriger" <akriger(at)greaterthanone(dot)com>
To: "Pgsql-General" <pgsql-general(at)postgresql(dot)org>
Subject: query for non-unique values?
Date: 2002-09-23 21:46:12
Message-ID: OJEFIHHAALOBKKJEOMBDAELNCAAA.akriger@greaterthanone.com
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I have a file of legacy data that has duplicate entries in a column that I'd
like to have a unique index on. How can I query to find the duplicates (so I
can determine if they can be thrown out)?

thx

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