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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Find Difference between 2 Tables, 22 GB each, on unique key
I don't know if it's the fastest way but check
http://www.oracle.com/technology/oramag/oracle/05-jan/o15asktom.html
And search for "Comparing the Contents of Two Tables"
Vlado Barun, M.Sc.
Senior Data Architect, Cadre5
www.cadre5.com
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]
On Behalf Of VIVEK_SHARMA
Sent: Tuesday, April 12, 2005 4:29 AM
To: oracle-l_at_freelists.org
Cc: oracledba_at_lazydba.com
Subject: RE: Find Difference between 2 Tables, 22 GB each, on unique key
Folks
Need to get=A0the difference records between 2 tables each of size 22GB =
(each containing 32 Million rows). The temp tablespace is 30GB.
Unique index exists on the respective fieldname on which to check for = difference.
Which of the following approaches is faster/most efficient?
Qs Will doing a FULL index ONLY Scan be faster than a FULL Table scan?
Machine configuration - 4 cpu's and 1GB DIMM RAM.=20
OS version - Unix Sun Solaris machine Version not known.
Oracle version -=A0 8.1
Nature of application -=A0Joins and inserts
production issue -=A0 Yes
Tables being accessed by other applications - YES, during certain time =
slot. We have abt 12-14hrs when they are not touched by any application.
=A0
Thanks
-- http://www.freelists.org/webpage/oracle-l -- http://www.freelists.org/webpage/oracle-lReceived on Tue Apr 12 2005 - 09:26:24 CDT
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