When declaring foreign key constraint for relation A thai references relation B. the referenced attribute(s) of the relation B must be declare as_______

When declaring foreign key constraint for relation A thai references relation B. the referenced attribute(s) of the relation B must be declare as_______

When declaring foreign key constraint for relation A thai references relation B. the referenced attribute(s) of the relation B must be declare as_______




[A]
UNIQUE or PRIMARY KEY
[B]
FOREIGN KEY
[C]
INDEX KEY
[D]
All of the others



Answer: A


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