Entity Relationship Diagram Example: Research Cooperation and Exchange


ER diagrams can be used to show the business entities of a domain. This example shows the attributes and relationships between entities like professor, project, school, researcher, etc.

To edit this ERD template, simply click on Use this Template, then adjust the ERD to your liking. Alternatively, click Create Blank to draw your ER diagram from scratch.

What is Entity Relationship Diagram (ERD)?

The Entity-Relationship (ER) diagram (also known as ERD's or ER models) is a classical and popular conceptual data model originally proposed by Peter in 1976. It is a visual representation of different entities within a system and how they relate to each other. Entity Relationship Diagrams are widely used to design relational databases. The entities in the ER schema become tables, attributes and the converted database schema. Since they can be used to visualize database tables and their relationships it's commonly used for database troubleshooting as well.

Guidelines for creating ERD

List below are some tips that will help you create ER diagrams:

  • Identify all the relevant entities in a given system
  • An entity should normally appear only once in a particular diagram.
  • Provide a precise and appropriate name for each entity, attribute, and relationship in the diagram.
  • Determine the relationships among these entities.
  • Remove vague, redundant or unnecessary relationships between entities.
  • Never connect a relationship to another relationship.
  • Make effective use of colors for classifying similar entities.

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