Hi, Result of A U B has 5 tuples and C has 2 tuples.
condition is either A.Id > 40 or C.Id < 15 First consider C.Id < 15 : 1 tuple from C satisies this condition Hence join this 1 tuple with 5 tuples of A U B = 5 new tuples A.Id > 40 yields 2 tuples from A U B - join this with the remaining tuple of C = 2 new tuples Hence 7 new tuples. --
