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Star schemas

Two "dimensional modeling” techniques are generally used for modeling the data structures within a data warehouse context.

These are the "star schema” and "snowflake schema” techniques. Both find their roots within the Kimball dimensional modeling techniques.

A star schema is the preferred technique within the Kimball approach.

Properties of star schemas :

  • are easier to navigate
  • improves query performance
  • eases the "browsing” of dimensionsis
  • more widely used and
  • the dimensions are fully de-normalized.