Question

I have a 200 line long stored procedure, which gets a parameter ‘prmtr’,

What I want to do is add an “sql part” to my stored procedure, according to my parameter.

example:

SELECT A.* FROM
(
SELECT * FROM table1
) A

IF (my parameter) = a

LEFT JOIN
(
SELECT * FROM table2
) B
ON A.ID= B.ID

Answer 1

You can do it like this

SELECT  A.* 
FROM    (
            SELECT  * 
            FROM    table1
        ) A LEFT JOIN 
        (
            SELECT  * 
            FROM    table2
        ) B ON  @prmt = 'A'
            AND A.ID= B.ID