Yes, you read the title correctly — there are three editions of MySQL available, according to http://www.mysql.com/products/enterprise/server.html (http://www.mysql.com/products/enterprise/server.html). Well, that page names two, and then of course there is the community edition….
From the manual page:
MySQL Enterprise Server is available in the following editions:
* MySQL Enterprise Server – Pro is the world’s most popular open source database that enables you to rapidly deliver high performance and scalable Online Transaction Processing (OLTP) applications.
* MySQL Enterprise Server – Advanced is the most comprehensive edition of MySQL. It provides all the benefits of MySQL Enterprise Server Pro and adds horizontal table and index partitioning for improving the performance and management of VLDBs