T-SQL How to end an IF-ELSE IF-ELSE block

Question

When I run the below procedure with the correct parameters so that the -1 value isn\'t returned, none of my DML statements are firing. I\'m guessing that it\'s treating all my D

Answer 1

In your case (pun intended), you might be better off using a CASE WHEN construction, seeing you want to evaluate different values for your @Code variable. MSDN states that CASE is intended exactly for such scenarios:

Evaluates a list of conditions and returns one of multiple possible result expressions.

I find it makes code a bit more readable for simple evaluations (but that could very well be a personal preference).

Your code would end up looking similar to this (pseudo-code. not tested):

CASE @Code 
    WHEN 'KP' THEN SET @stringConcat += 'Y';
    WHEN 'RL' THEN SET @stringConcat += 'Z';
    ElSE
        -- Return error code and stop processing
        SELECT -1;
        RETURN;
END 

More on the CASE statement here:

https://msdn.microsoft.com/en-us/library/ms181765.aspx