Entity-relationship (ER ... primary or foreign keys of your tables. Generalization and specialization are two ways of organizing entities in an ER diagram based on their similarities and differences.

For example, a customer entity may have ... and managers or products and services. These are called generalization and specialization, and they can be shown in ERDs by using an is-a relationship ...

generalization, specialization, aggregation, dependency and composition. In this article we would discuss dependency and inheritance relationships in OOP with code examples in C# to illustrate the ...