Question

I would like to know how I can use local variables in CASE statements in SQL?

This script gives me an error:

    DECLARE @Test int;
    DECLARE @Result char(10);
    SET @Test = 10;

    CASE @Test
    WHEN @Test = 10
    THEN SET @Result='OK test'
    END
    Print @Result;

I use MS SQL 2008.

Answer 1

Two ways to use CASE in this scenario with MSSQL

DECLARE 
    @test   int,
    @result char(10)

SET @test = 10

SET @result = CASE @test
    WHEN 10 THEN 
        'OK test'
    ELSE
        'Test is not OK'
END

PRINT @result;

SET @result = CASE 
    WHEN @test = 10 THEN 
        'OK test'
    ELSE
        'Test is not OK'
END

PRINT @result