by Mark McIlroy
Publisher: Blue Sky Technology 2009
Number of pages: 34
SQL Essentials is an e-book that is an introduction to the use of SQL to retrieve data from databases and generate query result tables. The book covers SQL queries and is suitable for beginners and intermediate users. This includes an on-line environment where you can try out the examples from the book.
Download or read it online for free here:
This book is a compact comparative reference for several SQL language dialects. It lists particular common tasks and problems resolved in terms of several SQL server implementations. When possible, it tries to emphasize an universal solution.
by Markus Winand
SQL performance problems are everywhere, everyday. This book is a free SQL tuning e-book for developers. It avoids unnecessary details about database internals but highlights the one topic that is most often neglected: proper indexing.
by Rahul Batra - dreamincode.net
This is a short e-book teaching the basics of SQL assuming no prior knowledge of it. While the examples and text use Ingres as the database management system, the code should work correctly on any SQL compliant database.
by Ryan Stephens, Ron Plew - Sams
This book presents the key features of SQL in an easy to understand format with updated code examples. The material covers transactions, constructs, embedded databases, object-oriented programming, and MySQL, a very popular open source database.