In a relation,each row is unique and uniqueness is guaranteed because the relation has a non-empty ________ key value.
A)Unique
B)Composite
C)Candidate
D)Primary

Question

Quizplus · Accepted Answer

The primary key is a unique identifier for each row in a relation. It ensures that each row is unique and can be used as a reference to other rows in the relation. A candidate key or composite key could also ensure uniqueness, but a primary key is the most commonly used and accepted method. A unique key simply requires that each value in the key is unique, but it does not necessarily have to be a primary identifier.

In a Relation,each Row Is Unique and Uniqueness Is Guaranteed