The database requirement that foreign keys must be null or have a value corresponding to the value of a primary key in another table is formally called the
A) entity integrity rule.
B) referential integrity rule.
C) rule of keys.
D) foreign key rule.

Question

Quizplus · Accepted Answer

The requirement that foreign keys must be null or have a value corresponding to the value of a primary key in another table is known as the referential integrity rule. This ensures that the relationships between tables are maintained and that data remains consistent.

The Database Requirement That Foreign Keys Must Be Null or Have