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A star schema has what type of relationship between a dimension and fact table?

  • A.Many-to-many
  • B.One-to-one
  • C.One-to-many
  • D.All of the above.

Answer: C

Correct answer: One-to-many

Each row of a dimension - one product, one date, one store - relates to many rows of the fact table, and each fact row points to exactly one row of each dimension. That is what gives the star its shape, with the fact table at the centre surrounded by its dimensions.

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