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databaseweak-entity

Example of a strong and weak entity types

I've tried to look on Google about a decent explanation of weak and strong entity type, but I haven't fully understood them.

Could someone give me an example of a strong and weak entity type?

Solution

  • A weak entity is one that can only exist when owned by another one. For example: a ROOM can only exist in a BUILDING. On the other hand, a TIRE might be considered as a strong entity because it also can exist without being attached to a CAR.