Home Forums SQL Server 2012 SQL Server 2012 - T-SQL Slow running query RE: Slow running query

  • April 13, 2013 at 9:23 pm

    #1606281

    TheSQLGuru (4/13/2013)

    Good points Jeff. I would definitely look at pre-populating the concatenated objects as temp tables. I had that in my notes I took while looking at alternatives for this and just missed putting it in the reply! :hehe:

    I looked at prepopulating those temp objects tho and I think in order to get the table key and the concatenated string is a double hit on the table for the methods I checked (except for cursor, which has is it's own issues obviously). SQL CLR into a temp object could still be best.

    Agreed on the double hit but it would be one-time and that's far better than hitting the table 6 times for every row in the outer query.

    While I agree that SQL CLR can work miracles with strings, I'm also aware that there is some overhead involved. I could certainly be wrong but I don't believe that SQL CLR would be much more effecient in this particular case.

    --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.

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