Entity Relationship Diagrams

Entity Relationship Diagrams (ERM) are used to model the information within a relational database. These diagrams can help enforce the Normalisation process. Once ERMs have been designed they can be used to create tables within the database. 

Diagram 5.1

 

 

 

Diagram 5.1 shows supporters have a one to many relationships with Activities, Supporter Letters, and Donations. The fork end of the blue line in diagram 5.1 represents a many side of the relationship.