From: Kent Anderson <kenta@ezyield.com>
To: Pgsql-Sql@Postgresql. Org <pgsql-sql@postgresql.org>
Subject: Finding duplicated values
Date: Thu, 21 Oct 2004 14:58:52 -0400
Message-ID: <LPENJIOOLAIJBFKIBDKOIEAHFPAD.kenta@ezyield.com> (raw)
I have a few tables that have duplicated values from an import from a
different database. I have two keys I tried to set as primary and got an
error
ERROR: could not create unique index
DETAIL: Table contains duplicated values.
Is there some join I can use to compare the hmhmkey, wmwmkey pairs against
the table to find duplicate values? Each pair key should be unique but the
old database was less than normalized.
I was trying to use the code below but it returned no rows.
SELECT hmhmkey, wmwmkey
FROM exceptions
EXCEPT
SELECT hmhmkey, wmwmkey
FROM exceptions;
Any suggestions?
Kent Anderson
EZYield.com
407-629-0900
www.ezyield.com
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To: pgsql-sql@postgresql.org
Cc: kenta@ezyield.com
Subject: Re: Finding duplicated values
In-Reply-To: <LPENJIOOLAIJBFKIBDKOIEAHFPAD.kenta@ezyield.com>
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