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Weak entity

Entity Type with no key or Primary Key are called weak entity Type.
The Tuples of weak entity type may not be possible to differentiate using one attribute of weak entity.For every weak entity, there should be unique OWNER entity type. In the below example, CHILD is a WEAK entity type and Employee is the OWNER entity type.

Example of weak entity type is –

weak entity type(entity and its types)

omkar nath @omkarnath
4 May 2017 03:32 am

Weak entity Defination

Pritam Prasun @pritam
4 May 2017 12:52 pm
Nice notes.