Home Forums SQL Server 2005 T-SQL (SS2K5) Calculating age RE: Calculating age

  • September 7, 2013 at 3:59 pm

    #1648359

    math martinez (11/16/2012)

    SO HERE ARE THE QUERY

    DECLARE @DOB SMALLDATETIME

    SELECT @DOB = '11/15/1987'

    SELECT

    CASE

    WHEN MONTH(@DOB) >= MONTH(GETDATE()) AND DAY(@DOB) >=DAY(GETDATE()) THEN DATEDIFF(YY,@DOB,GETDATE())

    ELSE DATEDIFF(YY,@DOB,GETDATE())-1

    END AS AGE

    HOPE I CAN HELP! 🙂

    It also has a Leap Year bug. I changed GETDATE() in your code to @Now to make it simple to test. Notice that your code says a person is 1 year old for the given dates, which is incorrect..

    DECLARE @DOB DATETIME

    ,@Now DATETIME

    SELECT @DOB = '2000-03-31'

    ,@Now = '2001-03-30'

    SELECT

    CASE

    WHEN MONTH(@DOB) >= MONTH(@Now) AND DAY(@DOB) >=DAY(@Now) THEN DATEDIFF(YY,@DOB,@Now)

    ELSE DATEDIFF(YY,@DOB,@Now)-1

    END AS AGE

    --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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