Ben Forta 
Sams Teach Yourself SQL in 10 Minutes [EPUB ebook] 

Sams Teach Yourself SQL in 10 Minutes has established itself as the gold standard for introductory SQL books, offering a fast-paced accessible tutorial to the major themes and techniques involved in applying the SQL language. Forta s examples are clear and his writing style is crisp and concise. As with earlier editions, this revision includes coverage of current versions of all major commercial SQL platforms. New this time around is coverage of My SQL, and Postgre SQL. All examples have been tested against each SQL platform, with incompatibilities or platform distinctives called out and explained.