Which of the following correctly describes the Referential Integrity Rule?
A)The primary key of a table must have data values (cannot be null).
B)Each attribute in a table must have a unique name.
C)The data value for a foreign key could be null.
D)Values of a specific attribute must be of the same type.

Question

Quizplus · Accepted Answer

Referential Integrity Rule states that a foreign key in one table must either be null or match a primary key value in another table.

Which of the Following Correctly Describes the Referential Integrity Rule