RE: de-dup process

From: Bobak, Mark <Mark.Bobak_at_il.proquest.com>
Date: Tue, 12 Dec 2006 17:53:07 -0500
Message-ID: <AA29A27627F842409E1D18FB19CDCF270AA242EA@AABO-EXCHANGE02.bos.il.pqe>

Lots of solutions. Try a search on AskTom (http://asktom.oracle.com/) or MetaLink specifying "delete duplicate rows".

-Mark

Mark J. Bobak

Senior Oracle Architect

ProQuest Information & Learning

There is nothing so useless as doing efficiently that which shouldn't be done at all. -Peter F. Drucker, 1909-2005

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of A Ebadi Sent: Tuesday, December 12, 2006 5:31 PM To: oracle-l_at_freelists.org
Subject: de-dup process

We have a huge table (> 160 million rows) which has about 20 million duplicate rows that we need to delete. What is the most efficient way to do this as we will need to do this daily? A single varchar2(30) column is used to identified duplicates. We could possibly have > 2 rows of duplicates.

We are doing direct path load so no unique key indexes can be put on the table to take care of the duplicates.

Platform: Oracle 10G RAC (2 node) on Solaris 10.

Thanks!

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http://www.freelists.org/webpage/oracle-l Received on Tue Dec 12 2006 - 16:53:07 CST