Weak Entity Types
Explore weak entity types within the Entity-Relationship model, focusing on their lack of key attributes, reliance on owner entities for identification, and their representation through partial keys and identifying relationships. This lesson helps you understand how to distinguish weak entities and their constraints in ER diagrams.
We'll cover the following...
We'll cover the following...
Weak entity types
Entity types that do not have key attributes of their own are called weak entity types like the DEPENDENT entity type in the company database.
In contrast, regular entity types that do have a key attribute are called strong entity types. Entities belonging to a weak entity type are identified ...