Question: Which statement is not correct? a. A snowflake schema normalizes the fact table of a star schema. b. A fact constellation schema has more than

Which statement is not correct?

a. A snowflake schema normalizes the fact table of a star schema.

b. A fact constellation schema has more than one fact table which can share dimension tables.

c. Surrogate keys essentially buffer the data warehouse from the operational environment by making it immune to any operational changes.

d. A factless fact table is a fact table that only contains foreign keys and no measurement data.

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