For any relation R, if, for every valid instance of A, that value of A uniquely determines the value of B:
A) then a primary dependency exists in the relation.
B) then A is said to be functionally dependent on B.
C) then B is said to be functionally dependent on A.
D) then A and B are candidate keys for the relation.
E) None of the above are True.

Question

Quizplus · Accepted Answer

If every valid instance of A uniquely determines the value of B, then B is said to be functionally dependent on A. This is a basic definition of functional dependency in database management systems.

For Any Relation R, If, for Every Valid Instance of A