
The Data Mart is customized and/or summarized data derived from the data warehouse and tailored to support the specific analytical requirements of a business unit or function. It utilizes a common enterprise view of strategic data and provides business units more flexibility, control and responsibility. The data mart may or may not be on the same server or location as the data warehouse.
Data marts are departmental extensions of the data warehouse. Data marts are built from end users requirements. Data marts allow the department to own and to manage their own warehouse facilities.