8. Assume the schema consists of two relations R(A, B, C) and S(D, E). Consider the...

  

Transcribed Image Text:

8. Assume the schema consists of two relations R(A, B, C) and S(D, E). Consider the following queries in relational algebra: (a) A,C(OD=2(RA=E S)) (b) TAC (RA-E (OD=2S)) Are algebraic expressions (a) and (b) equivalent? Use no more than two sentences to explain your answer. (1 moints) 8. Assume the schema consists of two relations R(A, B, C) and S(D, E). Consider the following queries in relational algebra: (a) A,C(OD=2(RA=E S)) (b) TAC (RA-E (OD=2S)) Are algebraic expressions (a) and (b) equivalent? Use no more than two sentences to explain your answer. (1 moints)