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Comparing data between fairly large tables: ( 1 billion vs. 1 billion rows)

  • August 31, 2007 at 9:19 pm

    #730893

    I'm not sure you're telling the whole story... if the 800 million rows is a staging table, of sorts, why not just add a "present" column to it and update it with a simple join to the big table?  That would give you the rows that are in and not in the big table... that'll certainly make doing the MERGE I think you may be tring to do a bit easier.

    --Jeff Moden

    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.

    Helpful Links:
    How to post code problems
    How to Post Performance Problems
    Create a Tally Function (fnTally)

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