MySQL is the world's second most widely used open-source relational database management system (RDBMS). The SQL phrase stands for Structured Query Language.
The MySQL development project has made its source code available under the terms of the GNU General Public License, as well as under a variety of proprietary agreements. MySQL was owned and sponsored by a single for profit firm, the Swedish company MySQL AB, now owned by Oracle Corporation.
MySQL is a popular choice of database for use in web applications, and is a central component of the widely used Linux, Apache, MySQL, Perl/PHP/Phython (LAMP) open source web application software stack. Free software open source projects that require a full-featured database management system often use MySQL.
Cross-platform support, Stored procedures, Triggers, Cursors, updatable views, information scheme, etc.
MySQL Server - - http://dev.mysql.com/downloads/mysql/
MySQL Cluster - - http://dev.mysql.com/downloads/cluster/
MySQL Workbench - - http://dev.mysql.com/downloads/workbench/
MySQL Connectors - - http://dev.mysql.com/downloads/connector/
Programming Language
Comercial Use, several paid editions are available, and offer additional functionality
http://www.mysql.com/products/