Question: In a referential integrity constraint where attribute A.B references C.B, what must be checked in each of these modifications. Be precise. (a) inserting a tuple

In a referential integrity constraint where attribute A.B references C.B, what must be checked in each of these modifications. Be precise.

(a) inserting a tuple into relation A

(b) inserting a tuple into relation C

(c) deleting a tuple from relation A

(d) deleting a tuple from relation C

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