What are the integrity rules in DBMS?

Data integrity is one significant aspect while maintaining the database. So, data integrity is enforced in the database system by imposing a series of rules. Those set of integrity is known as the integrity rules.

There are two integrity rules in DBMS:

Entity Integrity : It specifies that “Primary key cannot have a NULL value.”

Referential Integrity: It specifies that “Foreign Key can be either a NULL value or should be the Primary Key value of other relation