Domain constraints, functional dependency and referential integrity are special forms of _________
A. Foreign key
B. Primary key
C. Assertion
D. Referential constraint
I got this question in exam.
The origin of the question is Integrity Constraints in portion SQL : Queries, Constraints and Triggers of Database Management
The correct answer is C. Assertion
Best explanation: An assertion is a predicate expressing a condition we wish the database to always satisfy.