An artificial column added to a relation to serve as the primary key is a ________.
A)composite key
B)candidate key
C)foreign key
D)surrogate key
E)dependency

Question

Quizplus · Accepted Answer

An artificial column added to a relation to serve as the primary key is known as a surrogate key. It is usually an auto-generated key that has no intrinsic meaning and is used purely for identifying records within the table.

An Artificial Column Added to a Relation to Serve as the Primary