Answer Posted / mallikarjun

There are 3 types of Schemas,
1.Star Schema
2.Snowflake Schema
3.Galaxy/Integrated/Hybride/Consalation Schemas
1)Star Schema-It is defined as the fact table is centrally located,surrounded by dimension tables is called star schema.In that dimension tables are denormalized and fact table is normalized.(or)Star schema is defind as two or more fact and two or more dimension tables that are related to foreigh keys.
2)Snowflake Schema-It is defind as the Denormalized Dimensions tables are can be splited into two or more normalized dimensions is called snowflake schema.In that both dimensions and fact tables are normalized.
3)Hybride Schema-It is defind as a dimension table is shared by two or more fact tables.

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