I recently asked my Twitter followers if they had a good example of queries, business questions that SQL can't do. It turns out a better question is "what SQL can't do easily," so I thought I'd share with everyone what I heard and found.

Seth Grimes was the first one to provide an excellent answer with some informative examples -- thank you, Seth! I also found very useful articles on typical SQL challenges such as avoiding multiple, duplicate sets in your SQL results, and why NULLs create tons of headaches for SQL coders.

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