Which of the following statements best describes the entity integrity rule?
A)A database entity must fit within the REA model.
B)A record's foreign key value must be null.
C)A record's primary key must have a data value.
D)All values of an attribute must be of the same data type.

Question

Quizplus · Accepted Answer

The entity integrity rule states that a record's primary key must have a data value. This means that every record in a table must have a unique identifier, and that identifier cannot be null.

Which of the Following Statements Best Describes the Entity Integrity