The database constraint that says 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)referential entity rule.

Question

Quizplus · Accepted Answer

The formal name for the database constraint that specifies foreign keys must correspond to primary keys in another table is the referential integrity rule. This rule ensures that relationships between tables are maintained and properly recorded. The other answer choices are not accurate descriptions of this constraint.

The Database Constraint That Says That Foreign Keys Must Be