mysql 查看与修改字符集？

mysql> show variables like '%char%';  

mysql> show table status from sqlstudy_db like '%countries%';  

mysql> show full columns from countries;  

[root@Centos7 bin]#vim /etc/my.cnf
[mysqld]
datadir=/data/mysql
port            = 3306
socket          = /tmp/mysql.sock
character_set_server=utf8