MySQL is an open source multithreaded, multi-user relational database management system (RDBMS) based on Structured Query Language (SQL). MySQL runs on all major platforms, including Linux, UNIX, and Windows.Mysql is second most popular and widely used open source database. MySQL is a central component of the LAMP open-source web application software stack.LAMP is an acronym for "Linux, Apache, MySQL, Perl/PHP/Python". Applications that use the MySQL database include: TYPO3, MODx, Joomla, WordPress, phpBB, MyBB, and Drupal. MySQL is also used in many high-profile, large-scale websites, including Google, Facebook,Twitter,Flickr,and YouTube.