I am creating a cascading report , The 1st parameter Values here are NULL as well as ''
However , when i write query for 2nd parameters
I pass the values as
where (Program_group = @master OR @master IS NULL OR @master = ' ')A
But The list I get in both cases be it blank or with Null is the same. Somehow its not treating NULL as NULL its treating it as blank too.
P.S : I have selected Allow Null and Allow Blank in the parameter properties.
Anything that I am missing????????????