DataBase Systems 5th Edition, Silberschatz, Korth and Sudarshan - Chapter 1
1.1R. Meersman --Adapted from: Database System Concepts --Silberschatz, Korth, Sudarshan Chapter 6: Integrity and Security Domain Constraints Referential.
Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan Chapter 29: Microsoft SQL Server.
