20. The method as claimed in claim 1 , wherein the providing data management services comprises: managing creation and modification of warehouse tables in the data warehouse; and managing loading of the data into the warehouse tables from the source systems.
20. The method as claimed in claim 1 , wherein the providing data management services comprises: managing creation and modification of warehouse tables in the data warehouse; and managing loading of the data into the warehouse tables from the source systems. 23. The method as claimed in claim 20 , wherein the managing creation and modification of warehouse tables comprises, in response to user's action on a warehouse table, performing a table management process for updating warehouse tables that are impacted by the user's action.