Let R be a relation with schema (A_1, A_2, ....., A_n, B_1, B_2, 3....B_m) and l

Question

Let R be a relation with schema (A_1, A_2, ....., A_n, B_1, B_2, 3....B_m) and let S be a relation with schema (B_1, B_2, ....B_m); so that the attributes of S are a subset of the attributes of R. The quotient of R and S, denoted R S, is the st of tuples t over attributes A_1, A_2, ...., A_n such that for every tuple in s in S, the tuple ts, consisting of the components of t for A_1, A_2, ....., A_n and the components of s for B_1, B_2, ....B_m, is a member of R. Given an expression of relational algebra, using the operators we have defined before in this section, that is equivalent to R S.

Explanation / Answer

From the given information A , A , …..,A and B , B , ….B ) are the attributes of Rand also B , B , ….B are the attributes of S.

Result is A , A , …..,A (R S).

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