Physical Schema. A physical data model or physical schema is a representation of an implementation design; it defines data abstraction within physical parameters.

These models can be either conceptual, logical or physical. A good data model includes primary and foreign keys, which allow you to maintain referential integrity; this allows your database to ...

Navicat Data Modeler is a powerful, cost-effective data modeling and design tool that enables you to create high-quality conceptual, logical and physical data models for a number of use cases. You can ...

Layer 6: Presentation. The Presentation Layer represents the area that is independent of data representation at the application layer. In general, it represents the preparation or translation of ...