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Snowflake schema
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== Common uses == Star and snowflake schemas are most commonly found in dimensional [[data warehouse]]s and [[data mart]]s where speed of data retrieval is more important than the efficiency of data manipulations. As such, the tables in these schemas are not normalized much, and are frequently designed at a level of normalization short of [[third normal form]].<ref>{{Cite book|last=Han|first=Jiawei|title=Data Mining - Concepts and Techniques|publisher=Morgan Kauffmann Publishers|year=2012|isbn=9780123814791|location=Massachusetts, USA}}</ref>
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