Question

The four constraints that can be specified on relational databases are _____________________.

• A. Domain constraints, Key constraints, Entity integrity constraints and Referential integrity constraints.
• B. Key constraints, Database constraints, Normalisation constraints and Referential integrity constraints.
• C. Domain constraints, Database constraints, Normalisation constraints and Entity integrity constraints.
• D. None of these.

Answer 1

Answer: (A)

Domain constraints, Key constraints, Entity integrity constraints and Referential integrity constraints.

There are four different constraints, which can be specified on relational databases. They are domain constraints; key constraints; entity integrity constraints and referential integrity constraints.