Let the two-relation schema be R (A, B) and S (A, B). which of the following is equivalent to R ∩ S?
1
R – (R – S)
2
S – (S – R)
3
R U S – ((S – R) – (R – S))
4
((R U S – (S – R)) – (R – S)
Let the two-relation schema be R (A, B) and S (A, B). which of the following is equivalent to R ∩ S?