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Structured Query Language (SQL) is a widely-used programming language for working with relational databases. The name of the language is generally pronounced as the three letters of its abbreviation or, in some people's usage, as.

This Wikibook provides a short description of SQL, its origins, basic concepts and components, and a lot of examples. The book follows the specifications of the SQL:2011 standard, which is developed by a common committee of ISO and IEC. Their publications are not freely available, but can be ordered online. Or you may want to refer to a working draft, which you can download from Whitemarsh Information Systems Corporation.

Introduction

 * /About the Book/
 * /Database Management Systems (DBMS)/
 * /Relational DBMS (rDBMS)/
 * /SQL: A Language for Working with rDBMS/
 * /SQL: The Standard ISO IEC 9075 and various Implementations/
 * /Language Elements/
 * /Learning by Doing/

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Appendices

 * Warnings and Exceptions (SQLSTATE)
 * /Glossary/