What is an ER Diagram?
An Entity-Relationship (ER) diagram is a visual representation of data within a database. It's a tool used in database design to illustrate the logical structure of a database in a clear, concise manner.
Components of an ER Diagram:
- Entity: Represents a real-world object or concept, such as a person, place, thing, or event.
- Attribute: Describes properties or characteristics of an entity.
- Relationship: Describes how entities are related to each other.
Benefits of Using ER Diagrams:
- Helps visualize database structure.
- Aids in communication between stakeholders.
- Assists in identifying entities, attributes, and relationships.
- Forms the basis for database design.
Example of an ER Diagram:
