Question: Could you please supply a definition for "exploration data mart?

Chuck Kelley's Answer: To me, an exploration data mart is a subset of a data mart. Data marts are generally defined in the structure of the tool that best suits the need of the business - snowflake, star, multidimensional. Exploration data marts are for those tools that do more data mining. They are, generally but not always, built with very atomic data and in a very denormalized form (very few tables with lots of duplicate data).

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