Post reply

Does the query engine guarantee index order of numbers table in the join..

  • January 8, 2008 at 6:16 pm

    #202057

    Does the query engine guarantee index order of numbers table in the join

    with reference to the second example cited in your article.

    discussion round the campfire is speculating that if the index isnt in numeric order then the application in the second example will fail with eroneous replacements within the string..

    Does anyone have any deeper knowledge to dispell this concern ?

    Many Thanks

    Curious SQL People....

  • December 30, 2009 at 12:05 am

    #1097329

    Not sure which article you're referring to but the answer is "No... not for SELECT's". Even though a SORT won't show up on the execution plan, the only way to guarantee the order (seems like it's much better in 2k5 than 2k) is to use an order by on "N" in the Numbers or Tally table.

    --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)

Viewing 2 posts - 1 through 1 (of 1 total)

You must be logged in to reply to this topic. Login to reply