Data warehouses Basis:-

Data warehouses Basis:- Data warehouses are widely used within the largest and most complex businesses in the world. Use with in moderately large organizations, even those with more than 1,000 employees remains surprisingly low at the moment. We are confident that use of this technology will grow dramatically in the next few years. In challenging times good decision-making becomes critical. The best decisions are made when all the relevant data available is taken into consideration. The best possible source for that data is a welldesigned data warehouse. To make any new decision or to introduce new Plan data warehousing is very important. ETL is one of the main processes in data warehousing. ETL means extract transform and Load data into data warehouse.Informatica is ETL tool. It is very flexible and cheaper as compared to other ETL tool.