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Celko Company
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https://books.google.co.in/books?id=BtCOgrpzbz4C&printsec=frontcover&source=gbs_ge_summary_r&cad=0
Joe Celko's Thinking in Sets: Auxiliary, Temporal, and Virtual Tables in SQL - Joe Celko - Google...
Perfectly intelligent programmers often struggle when forced to work with SQL. Why? Joe Celko believes the problem lies with their procedural programming...
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Joe Celko's SQL for Smarties - 5th Edition | Elsevier Shop
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Joe Celko's SQL for Smarties - 4th Edition | Elsevier Shop
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