Database Design in OLAP

Database Design in OLAP :-
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* MDM:- Multi dimensional model.
* We can analyze data from multiple angles/dimensions by slicing and dicing the Info Cube.

*Star Schema:-
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* Fact Table/Transaction data table at the center surrounded by Dimension tables/Master data tables connected with Primary Key - Foreign Key and all these tables existing inside the cube.

* Fact Table?
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* any data what is stored in this table cannot be changed.

* Transaction data Table ?
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* We store Transaction data in this table.

* Master data Tables ?
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* These tables store Master data(Detailed information about an entity).

* Dimension Tables ?
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* Each Master data table is acting as a side of a cube.

* Transaction Data Table / Fact Table will have 2 types of Coloumns:-

 a) Characteristics : on what basis we  analyze a keyfigure.

 b) Keyfigures : What we are   Analyzing.

* Each Characteristics coloumn in the fact table/transaction data table will connect to one Dimension table/Master data Table.