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Message Posted: Fri, 10 Oct 2008 @ 16:16:40 GMT


     
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Subj:   Delete duplicate rows from a multi terabyte table
 
From:   Kallarakkal, Baburaj

Can anyone please advice the best way ( without impacting the system performance much ) to delete duplicate rows from a table > 1 TeraByte?

A ) FastExport all rows and then FastLoad /Multiload (with ignore Dupes).

B ) Multiload Delete - Not sure how the SQL would like since we cannot use RowID's.

C ) SELECT DISTINCT or SELECT .. WITH GROUP BY and then INSERT into a SET Table.


Any other suggested options? Ideas/Suggestions/Thoughts welcome and appreciate. Thanks in advance.


Regards,

Raj



     
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