注意:(mysql数据库不区分大小写,但符号一定要用英文格式)

**查看用户命令:**select user,authentication_string,host from user;

** 创建用户命令一,直接创建:**create user 'zhangsan'@'localhost' identified by 'abc123';

**创建用户命令二,权限创建:**grant all on . to 'lisi'@'localhost' identified by 'abc123';

**更改密码命令:**set password for 'zhangsan'@'localhost' = password('123abc');

**更改用户名:**rename user 'lisi'@'localhost' to 'wangwu'@'localhost';

密码忘记时解决办法(mysql5.7版本)

在【mysqld】下面插入

skip-grant-tables