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One of the most dramatic new developments in database design is the data warehouse, a powerful database model that significantly enhances managers' abilities to quickly analyze large multidimensional data sets. In this module students can learn practical information needed to design, manage, build and use dimensional data warehouses for virtually any type of business application. Employing many real-life case studies of data warehouses, the course provides clear guidelines on how to model data and design data warehouses to support advanced multidimensional decision support systems. Product-Oriented and Customer-Oriented data warehouse examples are explored. Beginning with a simple grocery store data warehouse example the course progresses to complex business applications in retail, manufacturing, banking, insurance, subscriptions, and airline reservations