SQL is a standard computer language for accessing and manipulating databases.
In this tutorial you will learn how to use SQL to access and manipulate data in Oracle, Sybase, SQL Server, DB2, Access, and other database systems.
http://www.google.com/search?client=opera&rls=en&q=sql&sourceid=opera&ie=utf-8&oe=utf-8
http://www.owebu.cz/databaze/vypis.php?clanek=50