The integrity methods can be fully defined by the cardinality constraints, using a small number of primitive update methods, and are automati- cally created for a given EER diagram. A translation of an EER schema into a logical database schema can create integrity routines by translating the ...
Ternary relationships represent the association among three entities whose constraints database designers do not always know how to manage. In other words, it is very difficult for the designer to detect, represent and add constraints in a ternary relationship according to the domain requirements. To...