授权之前必须创建用户才能授权
create user '用户'@'主机或者%(所有主机)' identified by '密码';
create user 'root'@'%' identified by '123qwe';
GRANT ALL ON *.* TO '已有的用户'@'主机' IDENTIFIED BY '密码';
GRANT ALL ON *.* TO 'root'@'%' IDENTIFIED BY '123qwe';
如果远程不能查看需要的库需要在vim /etc/my.cnf 中进入授权
[mysqld]
skip-grant-tables
修改后需要停了再开