Introduction To MySQL
Relational database management systems (RDBMS) have held mindshare among application developers as the most appropriate way to store critical data for several decades. In recent years the realities of scaling database systems in the Internet age have made customized solutions more practical than attempting to fit general-purpose RDBMSs to diverse application needs.
MySQL is a popular open-source RDBMS used extensively in Internet-connected applications, with Facebook as an example of one of its largest users