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Custom Expression in SQL

Discussion in 'SQL Exams' started by Fergal1982, Oct 11, 2007.

  1. Fergal1982

    Fergal1982 Petabyte Poster

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    Does anyone know how to set up a custom expression using T-SQL?

    I basically have a query that returns a bit column. I need to provide custom output from the query so that, if the value is 1 it returns a set string.

    Does that make any sense?
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  2. Ossian

    Ossian Bit Poster

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    Define a custom function e.g. ProcessBit taking the bit value as a parameter

    e.g.
    CREATE FUNCTION dbo.ProcessBit( @booVal bit)
    RETURNS varchar(20)
    AS
    BEGIN
    IF @booVal --should default to true
    RETURN 'True String'
    ELSE
    RETURN 'False String'

    END


    then

    SELECT ProcessBit(fieldname) AS "Result" FROM tablename

    Note this is not checked code, just a rough example!
     
    Certifications: MCT, MCSE/A, MCDBA, MCDST, MCITP, Sec+
    WIP: Not sure....
  3. Fergal1982

    Fergal1982 Petabyte Poster

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    Yeah I thought of doing that. Didnt want to use stored procedures if i could avoid it.

    Dont worry too much though, I realised I was being stupid and doing the wrong query, so its a moot point.
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present

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