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Physical integration of heterogeneous data sources is too high a price for small and medium level enterprises. This is primarily because of the variance in data base management system (MySQL, MsSQL, Oracle, etc.), underlying operating systems (Linux, Windows, etc.), besides numerous legacy sources (DBase, Foxplus, etc.). Enterprises are spending huge amounts for establishing data warehouses while as the data of interest increases gradually [Harmeek Bedi]. Over the years enterprises havedoi:10.14257/ijdta.2018.11.1.03 fatcat:jp2fmbs6ybe4jd3xyqe5rmiagm