> Table         Engine      Rows        Collation
> table__1      MyISAM      12500       utf8_general_ci
> table__2      InnoDB      12500       utf8_general_ci
> table__3      InnoDB      12500       utf8_general_ci
> table__4      MyISAM      12500       utf8_general_ci

ALTER DATABASE databasename CHARACTER SET utf8 COLLATE utf8_general_ci;