Question: Consider the relations r 1 (A, B, C), r 2 (C, D, E), and r 3 (E, F), with primary keys A, C, and E,

Consider the relations r₁(A, B, C), r₂(C, D, E), and r₃(E, F), with primary keys A, C, and E, respectively. Assume that r₁ has 1000 tuples, r₂ has 1500 tuples, and r₃ has 750 tuples. Estimate the size of r₁ ⋈ r₂ ⋈ r₃, and give an efficient strategy for computing the join.

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