Exclusive_relationship_(programming)
In computing, an exclusive relationship is a type of Relationship in computer data base design.
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In Relational Database Design, in some cases the existence of one kind of relationship type precludes the existence of another. Entities within an entity type A may be related by a relationship type R to an entity in entity type B or entity type C but not both. The relationship types are said to be mutually exclusive. Usually, both relationship types will have the same name.