Which of the following is true regarding referential integrity?

 

Answer: every foreign-key value must match a primary-key value in an associated table

Referential integrity constraint refers to the relationship between the tables.

The relationship between tables is maintained using foreign keys.

Referential integrity constraint states that a foreign key must have a matching primary key in associated table or must be null.

Referential Integrity constraint prevents entering a row in the child table (where you have the foreign key) for which you don't have any corresponding row in the parent table (primary key).