Mapping Cardinality Constraints Express the number of entities to which another entity can be associated via a relationship set. Most useful in describing binary relationship sets. For a binary relationship set the mapping cardinality must be one of the following types: One to one One to many Many to one Many to many Database System Concepts-5th Edition,Oct 5,2006 6.11 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 5 6.11 ©Silberschatz, Korth and Sudarshan th Edition, Oct 5, 2006 Mapping Cardinality Constraints Express the number of entities to which another entity can be associated via a relationship set. Most useful in describing binary relationship sets. For a binary relationship set the mapping cardinality must be one of the following types: One to one One to many Many to one Many to many