UPDATING SQL SERVER TABLE

Hello, I have two tables:

ACCESS_OFFERS and ACCESS_PROCESSED

Both tables have a field called ENDDATE and OFFERIDENTIFIER

What I need to do is to update the field ENDDATE at the ACCESS_PROCESSED table where the OFFERIDENTIFIER matches.

I was planning to do a loop for ACCESS_OFFERS and then an update for each OFFERIDENTIFIER, but there is a total of 900,000 records and it takes forever.

Is there a way to do an update with a single sentence? like "update ACCESS_PROCESSED set ENDDATE = ENDATE at ACCESS_OFFERS where OFFERIDENTIFIER matches"?

Thanks!
SimpleDudeAsked:
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Daniel ReynoldsSoftware Applications Developer / IntegratorCommented:
Give the following a try in your test environment

UPDATE ACCESS_PROCESSED
      SET ACCESS_PROCESSED.ENDDATE = b.ENDDATE
FROM ACCESS_PROCESSED
JOIN ACCESS_OFFERS b ON b.OFFERIDENTIFIER = ACCESS_PROCESSED.OFFERIDENTIFIER
 -- AND ....other join terms.
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AielloJCommented:
SimpleDude:

Do you have to do the update at all?  Why not simply join the tables in your query?  This would save a long update process.

Best regards,

AielloJ
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SimpleDudeAuthor Commented:
Thanks!
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Microsoft SQL Server 2008

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