Who solved Introducing SQL?

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Guy Gervais (SQL) Zolii_ (SQL) worldscientific (SQL) sam_bandara (SQL) Daniel Zambrano (SQL) Alexandr Milovantsev (SQL) blue_meeny (Python) OlehHilchenko (SQL) blue_mtn (SQL) Aneta Gabrisova (SQL) moe moe moe (SQL) robbin_b (SQL) bsalvaradoc (SQL) fctorrest (SQL) ruwenda58 (SQL)

Notes on the problem

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parameters 'withblanks' and 'limit' may be useful