Home Forums SQL Server 2005 SQL Server Newbies Coalesce returning 1 value only RE: Coalesce returning 1 value only

  • September 16, 2009 at 7:53 pm

    #1054785

    Matt is certainly on the right track... but you don't need a CASE statement...

    select A.grading, ISNULL(NULLIF(count(B.IDno),0),COUNT(B.IDno)) as myCount

    From A

    left join B on A.fkIDno = B.IDno and A.grading = 1

    left join C on A.fkIDno = C.IDno and A.grading = 2

    Where A.grading > 3

    As a sidebar, I used ISNULL instead of COALESCE because ISNULL is a bit faster across a million rows. If you believe in the MYTH of code portability, then you should change it back to COALESCE. 😛

    --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
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