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Snowflake schema is refinement of star schema where some dimensional hierarchy is further splitting (normalized) into a set of smaller dimension tables (Fig 7), forming a shape similar to snowflake.
dimension table of subjects, dimension table of suppliers (including supplier code, supplier name, location, contact person, telephone, competent department, sales personnel, etc.
A dimension table contains several values that are given an ID, which is used in the fact table instead of all the values.
Together with his colleagues at Metaphor, Kimball designed his first fact and dimension table data warehouse, which was installed at Clorox in 1984.
Sagent simplifies common loading tasks such as synthetic key generation, key lookup to confirm fact and dimension table data integrity, and time dimension creation.

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