Hi
I am trying to make a simple storehouse database with MS Access, I have 2 tables, in the first one I am puting (number) values of things that are entering the storehouse, and in the second I am entering the number of things that are leaving the storehouse. I am trying to make a validation rule that will limit the values entered in the second table - the sum of the number of things that are leaving the store can not be bigger then the sum of number of things that are entering the storehose. I tried to do that with expression builder but no luck so far. Can someone help me?