Data Warehouses and Olap: Concepts, Architectures and Solutions

Nowadays the economy is characterized by fast and continuously changing markets and business opportunities. Therefore, in order to be successful, it is essential for an enterprise to make right business decisions and to make them fast. Business decisions are taken on the basis of analyses of the past and current condition of an enterprise as well as market analysis and predictions for the future. To this end, various business operational data collected during the lifetime of an enterprise are analyzed. Typically, operational data are stored within an enterprise in multiple data storage systems (subsystems) that are geographically distributed, are heterogeneous and autonomous.