If the attribute (B)is functionally dependent on a composite key (A)but not on any subset of that ____ key,the attribute (B)is fully functionally dependent on (A).
A) foreign
B) unique
C) composite
D) complete

Question

Quizplus · Accepted Answer

The statement mentions that the attribute B is functionally dependent on a composite key A, which means that A is made up of two or more attributes. It also mentions that B is not functionally dependent on any subset of A, which rules out the possibility of A being a single attribute or a group of attributes that can be separated from the composite key. Hence, A is a composite key consisting of two or more attributes.

If the Attribute (B)is Functionally Dependent on a Composite Key