MySQL is the world's most popular open source database system. It’s available free and powers more websites and software applications than any other open source database system. It’s a great choice of database for web applications.
MySQL is the world’s most popular open source relational database, enabling the cost-effective delivery of reliable, high-performance and scalable Web-based and embedded database applications. Many of the world’s largest and fastest-growing organizations including Facebook, Google, Adobe, Alcatel Lucent and Zappos rely on MySQL to save time and money powering their high-volume Web sites, business-critical systems and packaged software.
MySQL has received positive reviews, and reviewers noticed that it performs extremely well in the average case, the developer interfaces are there, and the documentation is very good. It has also been tested to be as a fast, stable and true multi-user, multi-threaded SQL database server.