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Of course, part of the fun is to see whether or not you can write better solutions than Joe's. A great collection of tricky SQL puzzles with a variety of solutions and explanations. Uses the proven format of puzzles and solutions to provide a user-friendly, practical look into SQL programming problems - many of which will help users solve their own problems.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.