All primary key entries are unique,and no part of a primary key may be ____.
A) zero
B) a foreign key
C) null
D) a candidate key

Name: All primary key entries are unique,and no part of a primary key may be ____. A) zero B) a foreign key C) null D) a candidate key
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Question

Quizplus · Accepted Answer

A primary key cannot have a null value as it should uniquely identify each record in the table. If any part of the primary key is null, it will not provide a unique identifier for the record.

All Primary Key Entries Are Unique,and No Part of a Primary