Consider relation ‘R’ and ‘S’ have ‘n’ and ‘m’ tuples, respectively. Choose the best matching between List-I (Expression) and List-II (Maximum number of tuple):
Soln. According to me Answer should be Option C.
1.R union S = m+n (easy nothing to say)
2. Say Relations are like:- R(A,B,C) s(C,D)
R S
A B C C D
1 2 3 3 4
2 3 3 3 5
4 3 3 3 6
Now in R natual join S = m * n
So option C should suffice isn't it ?