Time In Databases(Cont.) Example of a temporal relation: account- number branch-name balance from to A-101 Downtown 500 1999/1/1 9:00 1999/1/2411:30 A-101 Downtown 100 1999/1/2411:30 A-215 Mianus 700 2000/6/2 15:30 2000/8/8 10:00 A-215 Mianus 900 2000/8/8 10:00 2000/9/5 8:00 A-215 Mianus 700 2000/9/5 8:00 米 A-217 Brighton 750 1999/7/5 11:00 2000/5/116:00 lemporal query languages have been proposed to simplity modeling of time as well as time related queries. 3 Database System Concepts,5th Ed. 24.3 ©Silberschat乜，Korth and SudarshanDatabase System Concepts, 5 24.3 ©Silberschatz, Korth and Sudarshan th Ed. 3 Time In Databases (Cont.) Example of a temporal relation: Temporal query languages have been proposed to simplify modeling of time as well as time related queries