Home Forums SQL Server 2008 SQL Server Newbies Group by and Where clause RE: Group by and Where clause

  • March 3, 2013 at 8:33 pm

    #1592853

    In the first query, you give SQL Server no choice. You say to find the MAX unconditionally for the given criteria and there isn't one so it returns a NULL.

    In the second query, it's different. You're saying find the MAX for a given group which is actually a condition. There are no groups that match your criteria so it returns nothing.

    --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.

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    How to post code problems
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    Create a Tally Function (fnTally)