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(#M40030354) DBMS Programming question DBMS Keep an EYE

What is Weak Entity set?

Asked In DBMS MAN (11 years ago)

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radhika  (9 years ago)

a weak entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction with its attributes to create a primary key. The foreign key is typically a primary key of an entity it is related to.

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rao  (7 years ago)

Weak Entity Sets

An entity set that does not have a primary key is referred to as a weak entity set.

The existance of a weak entity set depends on the existence of a strong entity set; it must relate to the strong set via a on-to-many relationship set.

A distriminator of a weak entity set is the set of attributes that distinguishes among all the entities of a weak entity set.

The primary key of a weak entity set is formed by the primary key of the strong entity set on which the weak entity set is existence depend, plus the weak entity set’s discriminator.

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Shreya  (7 years ago)

A weak entity set is an entity set that does not have a primary key .

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