Relationship Sets (Cont.) An attribute can also be property of a relationship set. For instance,the depositor relationship set between entity sets customer and account may have the attribute access-date depositor(access_date) account(account_number customer(customer_name) 24May2005 3 June 2005 A-101 lohnson 21June2005 A-215 Smith 10June2005 A-102 Hayes 17june2005 A-305 Turner 28May2005 A-201 Tones 28May2005- A-222 Lindsay 24June2005 A-217 23May2005 Database System Concepts-5th Edition,Oct 5,2006 6.7 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 5 6.7 ©Silberschatz, Korth and Sudarshan th Edition, Oct 5, 2006 Relationship Sets (Cont.) An attribute can also be property of a relationship set. For instance, the depositor relationship set between entity sets customer and account may have the attribute access-date