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query for non-unique values? - Mailing list pgsql-general

From Andy Kriger
Subject query for non-unique values?
Date
Msg-id OJEFIHHAALOBKKJEOMBDAELNCAAA.akriger@greaterthanone.com
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Responses Re: query for non-unique values?  (snpe <snpe@snpe.co.yu>)
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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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