Understanding Data Warehousing

Suppose that you are the president of a small, new company. Your company needs to grow, but you have limited resources to support the expansion. You have decisions to make, and to make those decisions you must have particular information. Much of the information you need comes from outside the organization. That’s why you read the Wall Street Journal and keep a bookmark in your browser pointed at www.bloomberg.com. But much of the information you need also comes from inside the organization, and much of that information is numerical. A data warehouse is a tool for storing and analyzing numerical information.

Ralph Kimball, perhaps the preeminent apostle of data warehousing philosophy, describes a data warehouse ...

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