Home Forums SQL Server 2008 T-SQL (SS2K8) how to concatenate o as perfix in case statment ? RE: how to concatenate o as perfix in case statment ?

  • ravi@sql (5/9/2013)


    Hi All,

    select Case when MONTH(GETDATE())=1

    then 12

    when LEN(MONTH(GETDATE()))=2 then MONTH(GETDATE())

    else right('0'+ convert(varchar(2), MONTH(GETDATE())),4) end

    In the above query else statment will come it as to come with zero(0) as prefix. AM expecting 05 as result . but am getting only 5 . zero is not considering as varchar.

    Please let me know the solution for this ?::(

    Regards,

    Ravi@sql

    Data type precedence:

    SELECT CASE

    WHEN MONTH(GETDATE()) = 1 THEN '12'

    WHEN LEN(MONTH(GETDATE())) = 2 THEN CAST(MONTH(GETDATE()) AS VARCHAR(2))

    ELSE RIGHT('0'+ convert(varchar(2), MONTH(GETDATE())),2)

    END

    INT has a higher data type precedence than VARCHAR, so each choice in the CASE was implicitly cast to INT. Avoiding mixing data types in CASE expressions is good practice.

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

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