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(21) Discuss the difference between existence dependency and identification dependency? - UpAnswers.Com (Homework Help)
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(21) Discuss the difference between existence dependency and identification dependency?

Question:

Discuss the difference between existence dependency and identification dependency?

 

SOLUTION

Total participation of an entity type in a relationship type is defined as existence dependency. Identification dependency is existence dependency where a weak entity type is always dependent on the unique identifier of its identifying parent for its unique identification.

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