·	Overview of Constraints

·	Corrective Constraints

·	Invocative Constraints

·	Constraint Checker

·	Deferred Constraints

·	Active and Inactive Constraints

·	Including Comments in Constraints

·	Restrictive Single-Record Constraints

·	Restrictive Multi-Record Constraints

·	How to Define a Domain Constraint

·	How to Define a Single-Record or Multi-Record Constraint