Data in the data warehouses is captured to allow business leaders to make well-informed decisions that are based on previous (working and not working) business data. It is generally known that to gain and sustain advantage in the economy of the present day is to leverage information better than others do. Thanks to data waresouses, platforms to deliver, manage and implement data assets are provided. So data warehousing is creating an architected solution (information-management) to enable informational and analytical processing in spite of numerous barriers that may be encountered.