MySQL is an open source relational database management system (RDBMS) that runs as a server providing multi-user access to a number of databases.
It is named after co-founder Michael Widenius' daughter, My. 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 LAMP open source web application
software stack (and other 'AMP' stacks). LAMP is an acronym for "Linux, Apache, MySQL, Perl/PHP/Python." Free-software-open source projects that
require a full-featured database management system often use MySQL.
For commercial use, several paid editions are available, and offer additional functionality. Applications which use MySQL databases include:
TYPO3, MODx, Joomla, WordPress, phpBB, MyBB, Drupal and other software. MySQL is also used in many high-profile, large-scale websites, including
Wikipedia, Google (though not for searches), Facebook, Twitter, Flickr, and YouTube.