Relationship Sets A relationship is an association among several entities Example: 44553(Peltier) advisor 22222(Einstein） student entity relationship set instructor entity A relationship set is a mathematical relation among n >2 entities,each taken from entity sets {(e1,e2,…en)le1∈E1,e2∈E2,,en∈En} where (e1,e2,...e)is a relationship Example: (44553,22222)∈advisor Database System Concepts 7.10 @Silberschatz,Korth and SudarshanDatabase System Concepts 7.10 ©Silberschatz, Korth and Sudarshan Relationship Sets A relationship is an association among several entities Example: 44553 (Peltier) advisor 22222 (Einstein) student entity relationship set instructor entity A relationship set is a mathematical relation among n  2 entities, each taken from entity sets {(e1 , e2 , … en ) | e1  E1 , e2  E2 , …, en  En } where (e1 , e2 , …, en ) is a relationship Example: (44553,22222)  advisor