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Message Posted: Thu, 03 Jan 2013 @ 22:09:24 GMT

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<-- Anonymously Posted: Thursday, January 03, 2013 16:19 -->

UPSERT is single row operation, so can be used if a small number of updates are coming from an external source.

MERGE is similar to INSERT/SELECT, so you need the update info loaded to a work table first.

Typically FastLoad followed by MERGE will perform better for large number of updates.

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