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Sql Query in Case Staement

  • March 1, 2012 at 4:04 pm

    #265379

    Can we write a Sql Query in the Then Clause of CASE Statement as shown below:

    DECLARE @Type INT

    SET @Type=10

    'Count'=

    CASE

    WHEN @Type=10 THEN SELECT COUNT(ItemId) FROM Item WHERE ....

    WHEN @Type=20 THEN SELECT COUNT(ItemId FROM ItemSupport WHERE ....

    END

    Thanks!!!

  • March 1, 2012 at 4:16 pm

    #1453946

    You very well can, as long as the statement you are using after the THEN clause does not return more than 1 value (1 column 1 row)

  • March 1, 2012 at 7:01 pm

    #1453965

    Yes but you need to encapsulate the SELECT in parenthesis and, as ColdCoffee identified, it must return only 1 value.

    --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)

  • March 12, 2012 at 12:25 pm

    #1458081

    Thanks guys for all the responses!!!

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