An entity set may not have sufficient attributes to form a primary key, and its primary key compromises of its partial key and primary key of its parent entity, then it is said to be Weak Entity set.

weak entity is an entity the entity which depends on strong entity for its existence
example:if employee entity exists then only department entity exists

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An entity whose existence depends on the existence of another entity is called a weak (or dependent) entity.
For eg: the dependent of an employee is a weak entity, whose existence depends on the entity employee.

Week Entity is an Entity type that 'Exists dependently' on other Strong Entity. There is no Week entity without exists Strong Entity.

Week Entity is an Entity type that 'Exists dependently' on other Strong Entity. There is no Week entity without exists Strong Entity.

An entity is an object that exists and is distinguishable from other objects. For instance, John Harris with S.I.N. 890-12-3456 is an entity, as he can be uniquely identified as one particular person in the universe.

the entity is called weak entity if it doesn't have its on primary key,it depends on the strong entity.
ex:-if loan is strong entity set then payment is the weak entity which depends on the strong entity loan

weak entity is an entity the entity which depends on strong entity for its existence
example:if employee entity exists then only department entity exists

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