An entity whose existence depends on the presence of another entity but whose identifier does not include the identifier of the other entity is a(n)________.
A)strong entity
B)weak entity
C)ID-dependent entity
D)subtype entity

Question

Quizplus · Accepted Answer

A weak entity is an entity whose existence depends on the presence of another entity, known as its owner entity. Its identifier does not include the identifier of the owner entity, but it has a partial identifier known as a discriminator. This discriminator distinguishes among the various instances of the weak entity that are owned by the same owner entity. Strong entities have their own unique identifier and do not depend on another entity for their existence. ID-dependent entity and subtype entity are not common classification terms in database design.

An Entity Whose Existence Depends on the Presence of Another