Update or merge which is faster

I would have gone for: update select ppst. Rating 3 ratings Is this answer out of date? You can also catch regular content via Connor's blog and Chris's blog. Or if video is more your thing, check out Connor's latest video and Chris's latest video from their Youtube channels. And of course, keep up to date with AskTOM via the official twitter account.

Questions Merge vs Update. Question and Answer. Thanks Koshal. I was a bit taken back. Per MSDN:. The conditional behavior described for the MERGE statement works best when the two tables have a complex mixture of matching characteristics.

For example, inserting a row if it does not exist, or updating the row if it does match. With a MERGE, you can take different actions based on the rows matching or not matching the target or source.

Consider if you want to do synchronize all chance from one table to the next. In this case merge become more efficient as less passes through the data. Read More Posts From Moshe. Survey says businesses are implementing predictive analytics, but not without challenges.

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