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DataStage - What is Snowflake schema?

asked Rams August 31, 2014 12:48 PM  

What is Snowflake schema?


1 Answers

answered By vishnoiprem   0  
Star Schema
In star schema each dimension is represented with only one dimension table.
This dimension table contains the set of attributes.

There is a fact table at the centre. This fact table contains the keys to each of four dimensions.
The fact table also contain the attributes namely, dollars sold and units sold.
Note: Each dimension has only one dimension table and each table holds a set of attributes. For example the location dimension table contains the attribute set {location_key,street,city,province_or_state,country}. This constraint may cause data redundancy. For example the "Vancouver" and "Victoria" both cities are both in Canadian province of British Columbia. The entries
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