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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))
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)
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Fundamentals Of Database Systems
Authors: Ramez Elmasri, Shamkant Navathe
7th Edition
0133970779, 978-0133970777
