This is a graduate level text and reference on the design of relational databases. It applies the entity- relationship model to the conceptual level of database design, and combines this application with rigorous treatment of the design of relational schemas. The book presents practical design theory and methods in a unified way. Features * Introduces unique material on: two level database design between the entity-relationship model and the relationship model, iterative database design, simple and intuitive integrity constraints, new algorithms and Design-By-Example (DBE) , a tool currently under development in Finland. * Includes coverage of the physical design of database and object-oriented databases. * Excellent use of examples.