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Answer Posted / sid
In the industry when a organisation goes for a enterprise
wide Datawarehouse the cost involved in setting up . its
maintenance and other overheads are also associated with
it. So due to budget and time constraints some
organisations initially set up a Data Mart to facililtate
there immediate needs . These Data Marts are generally set
up at department levels and in a future date if utility
arises then datamarts across the organisation can be
integrated and a full fledged data warehouse can be formed.
In a way Data Mart is a subset of Data Warehouse.
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