A FOREIGN KEY constraint can only reference a column in another table that has been assigned a(n)____ constraint.
A) NOT NULL
B) UNIQUE
C) CHECK
D) none of the above

Question

A FOREIGN KEY constraint can only reference a column in another table that has been assigned a(n)____ constraint.​
A) ​NOT NULL
B) ​UNIQUE
C) ​CHECK
D) ​none of the above

Quizplus · Accepted Answer

A FOREIGN KEY constraint typically references a column in another table that has been assigned a PRIMARY KEY or UNIQUE constraint, but not necessarily any of the options listed.

A FOREIGN KEY Constraint Can Only Reference a Column in Another