"Set Selection Group" vs "Set Aggregate Selection"

I have a JD Edwards 9.2 and I'm trying to create an Application with a Find & Browse form with some extra filters when pressed on button "Find". What I would like to do is creating a query like this:

select * from f4801 join f4101 on waitm=imitm where (wasrst ='05' or wasrst ='98') and (imprp4 ='02' or imprp4='03');

Naturally the values are just andd example and should be dinamically selected. I tried use the "Set Selection Group" and the "Set Aggregate Selection" but I can't recreate the desired select.

What are the differences between "Set Selection Group" and "Set Aggregate Selection"?