Home Forums SQL Server 2012 SQL Server 2012 - T-SQL Update Temp table where the column names are unknown RE: Update Temp table where the column names are unknown

  • December 26, 2013 at 1:19 pm

    #1676001

    This will lead to some pretty miserable performance on top of it all... it makes for a 100% non-SARGable query. You could have a thousand index on the columns involved and the absolute best you'll ever get is an INDEX SCAN.

    WHERE FORMAT(RegularTable.Date,'MM/yyyy') = FORMAT(##TempMonths.x,'MM/yyyy'))

    I knew people would abuse the new FORMAT function as soon as I saw it. :sick:

    --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)