3 Main Types of Constraints
1. Inherent/Implicit – based on data model itself2. Schema-based/Explicit – expressed in schema (e.g. cardinality ratio constraint)3. Application-based/semantic – enforced by applications
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3 Main Types of Constraints
1. Inherent/Implicit – based on data model itself2. Schema-based/Explicit – expressed in schema (e.g. cardinality ratio constraint)3. Application-based/semantic – enforced by applications