7. One-to-many (or many-to-one) relationships

Example of a one-to-many relationship

Think about a mother and her children.

A mother can have many children

A child can have only one mother

this would be known as a 'one-to-many relationship'

This relationship can be portrayed diagramatically as:

one to many relationship

 

Challenge see if you can find out one extra fact on this topic that we haven't already told you

Click on this link: ER one to many

 

Copyright © www.teach-ict.com