How do I illustrate relationships which has an attribute in chen notation to crows foot notation?
There is an attribute "quantity" in the relation. How do I draw that in crow's foot notation? Thanks
You want an intersection entitiy:
Intersection entities are used in the resolution of a many to many relationship. This resolution is done in order to store additional information which doesn’t fit into the attribute list of either entity in the M:M relationship.
See the Class entity below.