Which of the following types of constraints is used to enforce referential integrity?
A) UNIQUE
B) REFERS
C) FOREIGN KEY
D) CHECK

Question

Which of the following types of constraints is used to enforce referential integrity?​
A) ​UNIQUE
B) ​REFERS
C) ​FOREIGN KEY
D) ​CHECK

Quizplus · Accepted Answer

The FOREIGN KEY constraint is used to enforce referential integrity between two tables. It ensures that a value in one table's foreign key column corresponds to a valid record in the referenced table's primary key column. Unique, check, and refers constraints do not directly enforce referential integrity.

Which of the Following Types of Constraints Is Used to Enforce