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Data Warehousing: Architecture and Implementation by Michelle C. Dy, Michael W. Hawkins, Mark Humphries

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Chapter 2. Data Warehouse Concepts

In this chapter, we look briefly at how computing has changed its focus from operational to decisional concerns. We also define data warehousing concepts, and cite the typical reasons for building data warehouses.

Gradual Changes in Computing Focus

In retrospect, it is easy to see how computing has shifted its focus from operational to decisional concerns. The differences in operational and decisional information requirements presented new challenges that old computing practices could not meet. Below, we elaborate on how this change in computing focus became the impetus for the development of data warehousing technologies.

Early Computing Focused on Operational Requirements

The Business Cycle (depicted in Figure ...

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