Home Forums SQL Server 2008 T-SQL (SS2K8) T-SQL Pivot Question RE: T-SQL Pivot Question

  • July 17, 2014 at 7:55 pm

    #1730481

    Alan.B (2/7/2014)

    Using the tests below: at a million rows PIVOT generates a parallel plan and is like 4X faster. At 5million they both produce parallel plans and PIVOT is still twice as fast. I did not expect that.

    I know that this post is several months old but there's a reason for your findings... you used pre-aggregation for the PIVOT but not for the CROSSTAB. The two tests aren't the same.

    --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)