Weak and Strong entity type

Weak and Strong Entity Type

Entity type that do not have key attributes of their own or an entity type that Is dependent on some other entity are called weak entity type.
Regular entity has a key attribute called strong entity type and a relationship type that relates weak entity type to its owner is known as identity in relationship of the weak entity type.
For example:- in the following E-R Diagram Dependent is a weak entity.

Next Topic ➧ Database interfaces