What is the difference between a base entity type and a weak entity type?

QUESTION:

‘What is the difference between a base entity type and a weak entity type’?

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SOLUTION:

A base entity type is one where each entity has an independent existence (i.e., each entity is unique). A weak entity type is one where each entity does not have independent existence (duplicate entities may exist). A weak entity type is shown to make it clear that the entity type does not have a unique identifier.

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