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Message Posted: Wed, 27 Feb 2013 @ 12:32:10 GMT

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Subj:   Re: Performance of MERGE vs UPSERT
From:   Ranga, Dixit

Merge/Stack Merge is pretty useful when you go for update on huge table, since it updates rows on block by block.

Update updates the rows on row by row level.

So most of the time Merge saves execution time, CPU cycles and spool space.


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