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what is galaxy schema in context of dataware housing?

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what is galaxy schema in context of dataware housing?
posted Dec 16, 2013 by Neeraj Pandey

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Galaxy schema is also known as fact constellation scheme. It requires no of fact tables to share dimension tables.
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Star schema: A fact table in the middle connected to a set of dimension tables

Snowflake schema: A refinement of star schema where some dimensional hierarchy is normalized into a set of smaller dimension tables, forming a shape similar to snowflake

Galaxy Schema (Fact constellations): Multiple fact tables share dimension tables, viewed as a collection of stars, therefore called galaxy schema or fact constellation

answer Dec 16, 2013 by Anderson
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