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A subschema expresses

  • A.The logical view
  • B.The physical view.
  • C.The external view.
  • D.All of the above.

Answer: C

Correct answer: The external view.

A subschema is the external view: what one particular application or user group sees. The logical view is the whole database as a single community picture, and the physical view is how it is actually stored.

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