Relationships Between Entities
Frequently, a meaningful relationship exists between two different types of entity.
- Employees work in a department
- Lawyers advise clients
- Equipment is allocated to projects
- A truck is a type of vehicle
There are potentially three types of relationship which can exist between two different entities:
- One-to-One Relationships
- One-to-Many Relationships
- Many-to-Many Relationships.
Next: One-to-One Relationships