This Hospital ER Diagram Example is used to model and design relational databases in terms of logic and business rules (in a logical data model) and the specific technology that will be used (in a physical data model.) An ER diagram is frequently used as the first step in determining requirements for an information systems project in software engineering. It is later used to model a specific database or databases. A relational database has an equivalent relational table and can be expressed in this manner as needed.
