A primary key's main function is to uniquely identify a(n)within a table.
A)attribute
B)entity instance or row
C)entity subtype
D)natural key or identifier

Question

Quizplus · Accepted Answer

A primary key's main function is to uniquely identify a row or entity instance within a table. It is used to ensure that each record in the table is uniquely identifiable and can be retrieved or updated easily. Therefore, option B is the correct answer as it refers to entity instances or rows.

A Primary Key's Main Function Is to Uniquely Identify A(n)within