Home Forums SQL Server 2008 SQL Server 2008 - General SQL Function takes more than 2 hours to return a table.. RE: SQL Function takes more than 2 hours to return a table..

  • February 8, 2013 at 8:04 am

    #1585975

    bobie (2/7/2013)

    What I mean is not a combination temp table and while loop but temp table with an bulk update statement with help of variable, is it the same as while loop?

    Because if I check the statistics io and the time needed to execute it is much2 lower io and faster.

    Ah! Understood. Yes. Doing a "Divid'n'conquer" using a Temp Table to hold interim results during "bulk updates" is much better than using cursors or while loops. Of course, you can't use Temp Tables in functions and Table Variables usually aren't the thing to use when a lot of rows are present.

    --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)