mysql --user=db_user --password='db_pass' --database=db_name -B -N -e "SHOW TABLES"  | awk '{print "SET SESSION sql_mode='NO_ENGINE_SUBSTITUTION';", "ALTER TABLE", $1, "CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;"}' | mysql --user=db_user --password='db_pass' --database=db_name &