Describe domain constraints, Database Management System

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Describe domain constraints.

Domain constraints contain entity integrity and referential integrity. The domain is a set of values that might be assigned to an attribute. The entity integrity rule states that no part of a primary key cannot be null. Referential integrity states that every foreign key value must match a primary key value or be null.

 


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Answer, what is database management system? & why it is required?

what is database management system? & why it is required?

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