A Snowflake schema is a type of logical multidimensional database schema. It is an extension of the star schema, and is arranged in a star-like structure. The difference between the snowflake and star schema is that the dimensions in a snowflake schema are present in a normalized form. Normalization splits up the dimension data into additional tables. It is commonly used in data warehousing and business intelligence to improve query performance and data integrity, at the cost of increased complexity.
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