What is a data warehouse? Defined in many different ways, but not rigorously. a decision support database that is maintained separately from the organization s operational database Support information processing by providing a solid platform of consolidated, historical data for analysis a data warehouse is a subiect-oriented, integrated time-variant and nonvolatile collection of data in support of management's decision-making process. -W.H. Inmon Data warehousing: The process of constructing and using data warehouses4 What is a Data Warehouse? ◼ Defined in many different ways, but not rigorously. ◼ A decision support database that is maintained separately from the organization’s operational database ◼ Support information processing by providing a solid platform of consolidated, historical data for analysis. ◼ “A data warehouse is a subject-oriented, integrated, time-variant, and nonvolatile collection of data in support of management’s decision-making process.”—W. H. Inmon ◼ Data warehousing: ◼ The process of constructing and using data warehouses