when Oracle bought out MySQL and the creator forked it and made MariaDB
Wiki tells me: https://en.wikipedia.org/wiki/MySQL#History
Sun Microsystems acquired MySQL AB (the company) in 2008.
Oracle acquired Sun Microsystems in 2010.
The day Oracle announced the purchase of Sun, Michael "Monty" Widenius forked MySQL, launching MariaDB, and took a swath of MySQL developers with him.
Wiki tells me: https://en.wikipedia.org/wiki/MySQL#History
Sun Microsystems acquired MySQL AB (the company) in 2008.
Oracle acquired Sun Microsystems in 2010.