Data warehousing isn’t a new idea; conceptually, it’s been around for 30 years. From its initial inception as a method of storing relevant data from relevant systems into a specific application used for query reporting analysis, data warehousing has evolved into a technology that consolidates all information for the organization into one repository. An Enterprise data warehouse consists of multiple subject areas (finance, marketing, sales, etc.) and represents areas of interest for groups and for individuals who examine the data across several subject areas.

What's new, however, are the technologies now available for building an EDW. More and more enterprise organizations are building an EDW stack where several open source solutions are deployed in parallel with traditional products, or even stacks made entirely of open source technologies, ensuring the best price/performance ratios and openness.

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