Oracle - a database specifically designed as an Internet development and deployment platform. Commercial use requires a license. The main goals of MySQL are speed, robustness and ease of use. The base upon which MySQL is built is a set of routines that have been used in a highly demanding production environment for many years. Although MySQL is still under development, it already offers a rich and highly useful function set.
Commercial support is also available.
IBM DB2 - DB2 Universal Database for Linux offers support for JDBC and SQLJ, and Net. Data allows for the creation of dynamic data driven Web applications. DBMS - a database management system. A suite of programs which typically manage large structured sets of persistent data, offering ad hoc query facilities to many users. They are widely used in business applications.