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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

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