Data Marts is a subset of Data Warehouse.

Sr. Independent Data MartsDependent Data Marts
1 Independent Data Marts are Data Marts which access data directly from operation system.Dependent Data Marts are Data Marts which access data from the data warehouse.
2Independent Data marts structure is complex for ‘n’ number.Dependent Data Marts structure is simple.
3Independent Data Marts follows Top-Down approach.Dependent Data Marts follows Bottom-Up approach.

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