Basic Concepts(Cont Begree of a Relationship Set Refers to number of entity sets that participate in a relationship set Relationship sets that involve two entity sets are binary (or degree two). Generally, most relationship sets in a database system are binary Relationship sets may involve more than two entity sets E.g. Suppose employees of a bank may have jobs (responsibilities) at multiple branches, with different jobs at different branches. Then there is a ternary relationship set between entity sets employee, /gb and branch Relationships between more than two entity sets are rare. Most relationships are binary. (More on this later 5 Database System Concepts 2.9 OSilberschatz. Korth and SudarshanDatabase System Concepts 2.9 ©Silberschatz, Korth and Sudarshan Basic Concepts(Cont.) Degree of a Relationship Set Refers to number of entity sets that participate in a relationship set. Relationship sets that involve two entity sets are binary (or degree two). Generally, most relationship sets in a database system are binary. Relationship sets may involve more than two entity sets. Relationships between more than two entity sets are rare. Most relationships are binary. (More on this later.) E.g. Suppose employees of a bank may have jobs (responsibilities) at multiple branches, with different jobs at different branches. Then there is a ternary relationship set between entity sets employee, job and branch