Why can total participation of an entity type in a relationship type also be referred to as existence dependency of that entity type in that relationship type?

QUESTION:

Why can total participation of an entity type in a relationship type also be referred to as existence dependency of that entity type in that relationship type?

SOLUTION

Total participation occurs if, in order to exist, an entity type must participate in the relationship. Thus, total participation of an entity type in a relationship type can be termed existence dependency of that entity type in that relationship type.

 

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