Question: What are junk dimensions and degenerate dimensions and what is the importance of junk and degenerate dimensions in a data warehouse?

Chuck Kelley's Answer: Junk dimensions are dimensions that contain miscellaneous data (like flags and indicators) that do not fit in the base dimension table. Here is a link to Ralph Kimball and Margy Ross on junk dimensions. http://www.kimballgroup.com/html/designtipsPDF/DesignTips2003/KimballDT48DeClutter.pdf

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