Run this command

rpm -qa *mysql*

Result

php-mysql-5.3.3-3.el6_2.6.x86_64
mysql-connector-odbc-5.1.5r1144-7.el6.x86_64
mysql-5.1.61-1.el6_2.1.x86_64
mysql-server-5.1.61-1.el6_2.1.x86_64
mysql-libs-5.1.61-1.el6_2.1.x86_64