Question: Are (r ) s) tand rx (st) equivalent? ris a relation with schema (a, b1) s is a relation with schema (a, b2) t is

Are (r ) s) tand rx (st) equivalent? ris a relation

Are (r ) s) tand rx (st) equivalent? ris a relation with schema (a, b1) s is a relation with schema (a, b2) t is a relation with schema (a, b3)

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