Which of the following specifies that each instance of an entity type must have a unique identifier that is not null?
A)referential integrity constraints
B)triggering operations
C)entity integrity
D)domains

Question

Quizplus · Accepted Answer

Entity integrity specifies that each instance of an entity type must have a unique identifier that is not null. Referential integrity constraints concern foreign keys and their relationships with primary keys in related tables. Triggering operations are actions that are automatically performed in response to certain events, such as a record being inserted or updated. Domains are predefined data types with specific constraints.

Which of the Following Specifies That Each Instance of an Entity