Bill wishes to thank Steve Westmoreland of Bonneville Power Authority for his contribution to this month's column.

When most managers think about a data warehouse, one of their trains of thought is the cost of a data warehouse. Indeed, a data warehouse is something that requires investment. You cannot build a data warehouse without money; you need storage, processors, operating systems, software, ETL (extract, transform and load) and so forth. There's no getting around it - a data warehouse costs money, regardless of whose technology you choose to place it on.

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