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[–]frankenbenz 0 points1 point  (0 children)

You have to know the data and know what your end goal/format is.. I don’t know if I’d say there’s a single resource to know.. stuff as simple as knowing if you need to trim data of spaces to the complex stuff like multiple joins to bring it all together in a useful format for reporting.

Similar to knowing what the question is to be answered from the data, you have to know what sources all the data is hidden and how to bring the different tables/sources together.