From Oracle FAQ
The degree can be expressed as:
- 1:1 - One-to-One relationship in an ERD
- 1:N - One-to-many relationship in an ERD
- N:N - Many-to-many relationship in an ERD
For example: An employee can belong to one and only one department, but a department can have many employees (1:N).
- ARC relationship - indicate mutually exclusive relationships
|Glossary of Terms|