MySQL Enterprise subscription is the most comprehensive offering of MySQL database software, services and support to ensure your business achieves the highest levels of reliability, security, and uptime. MySQL Enterprise includes the MySQL Enterprise Server software, which is the most reliable, secure and up-to-date version of the world's most popular open source database. Users also receive monthly rapid updates and quarterly service packs with the latest bug fixes of MySQL Enterprise Server.

MySQL Community Edition is a freely downloadable version of the world's most popular open source database that is supported by an active community of open source developers and enthusiasts.

MySQL Cluster Community Edition is available as a separate download. The reason for this change is so that MySQL Cluster can provide more frequent updates and support using the latest sources of MySQL Cluster Carrier Grade Edition.

Online Documentation

• MySQL 5.1 Documentation and Change History
for the Generally Available (GA) Release

• MySQL 5.5 Documentation and Change History
for the Development release