MySQL wasn't acquired by Sun; that was a direct acquisition by Oracle in order to snuff out the most significant player in the realm of open-source SQL databases (and thus snuff out one of the most significant competitors to Oracle's flagship, Oracle DB).
As a result, MySQL is effectively dead outside of legacy deployments that haven't migrated to PostgreSQL, MariaDB, or one of the NoSQL monstrosities like MongoDB.
Even InnoDB was eventually forked; MariaDB and Percona both use XtraDB nowadays, probably because they didn't feel like being tied to something that - like every other open-source project Oracle has owned - would be fated to eventually wither and die.
What do you mean MySQL was not aquired by Sun? I was among ~400 MySQL employees in Orlando when the deal was announced. Yes, Sun was later bought by Oracle.
Huh. I always thought that Oracle acquired MySQL directly, but it turns out I was wrong (Sun did so in 2008). I guess you learn something new every day.
Maybe I was thinking of InnoDB or BerkeleyDB or somesuch and just conflated them all together...
