Unlike most data warehousing books, this one focuses specifically on using data warehouses for decision support. It shows how to choose the best tools and get the best answers. This book walks step-by-step through building and maintaining a data warehouse specifically to support decision making. At a high level, it discusses the fundamental ideas and concepts of data warehousing. It then explores state-of-the-art tools and applications that can be used to improve the decision-making data delivered by your data warehouse. Several vendors - including Oracle, the world's leading RDBMS vendor - present products and detailed case studies showing how to implement state-of-the-art decision support. For all database administrators and IT professionals, especially those involved in creating and building data warehouses or providing decision support.