Please enable JavaScript.
Coggle requires JavaScript to display documents.
3-6 RELATIONSHIPS (COMPONENTS OF ERDish (O (OPTIONALITY (must be/may be)),…
3-6 RELATIONSHIPS
-
WHAT?
A relationship is a bidirectional, significant association between 2 entities or between an entity and itself
Each direction has a:
- name
- cardinality = determines the degree to which one entity is related to another by answering "How many?"
-
-