Question: Let P and Q be relations, P = (A, B, C, D), Q = (A, D). Suppose that relation P contains 7 tuples and relation

Let P and Q be relations, P = (A, B, C, D), Q = (A, D). Suppose that relation P contains 7 tuples and relation Q contains 3 tuples. What is the maximal possible number of tuples in the result of the following relational algebra operations? a) R = (P Q), where " "is the division operation b) T = P*Q, where "*" is the natural join. For both cases show the content (tuples) of the relations P and

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