Consider the following relations r1 and r2: Identify the number of tuples in…

Consider the following relations r1 and r2:

Identify the number of tuples in the relation r1⋈r2

Answer: C. 7 — Explanation: P Q R Q R S -- -- -- -- -- -- p q r q r n m q r q r n p q r q r a m q r q r a p q r q r b m q r q r b d e f e f g 7 rows selected.

1. A.

   5

2. B.

   6

3. C.

   7

4. D.

   8

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