I do not yet get set analysis that well, so this might be a dumb question.
Is it possible to make a statement that you want a field to be in something, but still selectable?
I want it to always be within specific codes. Let say 450,455 & 550. If no user selection, I want to count all of the defined codes. But if the user select one of the eventcodes, I want only that one to be counted.