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A snowflake schema is which of the following types of tables?

  • A.Fact
  • B.Dimension
  • C.Helper
  • D.All of the above

Answer: D

Correct answer: All of the above

A snowflake schema is a star in which the dimension tables have themselves been normalised, so the dimensions are split into further tables. Fact, dimension and helper tables therefore all appear. The advantage is reduced redundancy; the cost is more joins and slower queries.

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