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