Chapter 4:Intermediate SQL Join Expressions Views Transactions Integrity Constraints SQL Data Types and Schemas Authorization Database System Concepts-6th Edition 4.2 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 4.2 ©Silberschatz, Korth and Sudarshan th Edition Chapter 4: Intermediate SQL Join Expressions Views Transactions Integrity Constraints SQL Data Types and Schemas Authorization