### 创建新用户 通过root用户登录之后创建 >> grant all privileges on *.* to testuser@localhost identified by "123456" ; //创建新用户,用户名为testuser,密码为123456 ; >> grant all privileges on *.* to testuser@localhost identified by "123456" ; //设置用户testuser,可以在本地访问mysql >> grant all privileges on *.* to testuser@"%" identified by "123456" ; //设置用户testuser,可以在远程访问mysql >> flush privileges ; //mysql 新设置用户或更改密码后需用flush privileges刷新MySQL的系统权限相关表,否则会出现拒绝访问,还有一种方法,就是重新启动mysql服务器,来使新设置生效 ### 设置用户访问数据库权限 >> grant all privileges on test_db.* to testuser@localhost identified by "123456"; //设置用户testuser,只能访问数据库test_db,其他数据库均不能访问 ; >> grant all privileges on *.* to testuser@localhost identified by "123456"; //设置用户testuser,可以访问mysql上的所有数据库; >> grant all privileges on test_db.user_infor to testuser@localhost identified by "123456"; //设置用户testuser,只能访问数据库test_db的表user_infor,数据库中的其他表均不能访问; ### 设置用户操作权限 >> grant all privileges on *.* to testuser@localhost identified by "123456" WITH GRANT OPTION ; //设置用户testuser,拥有所有的操作权限,也就是管理员 ; >> grant select on *.* to testuser@localhost identified by "123456" WITH GRANT OPTION ; //设置用户testuser,只拥有【查询】操作权限 ; >> grant select,insert on *.* to testuser@localhost identified by "123456" ; //设置用户testuser,只拥有【查询\插入】操作权限 ; >> grant select,insert,update,delete on *.* to testuser@localhost identified by "123456" ; //设置用户testuser,只拥有【查询\插入】操作权限 ; >> REVOKE select,insert ON what FROM testuser //取消用户testuser的【查询\插入】操作权限 ; ### 设置用户远程访问权限 >> grant all privileges on *.* to testuser@“192.168.1.100” identified by "123456" ; //设置用户testuser,只能在客户端IP为192.168.1.100上才能远程访问mysql ; ### 关于root用户的访问设置 设置所有用户可以远程访问mysql,修改my.cnf配置文件,将bind-address = 127.0.0.1前面加“#”注释掉,这样就可以允许其他机器远程访问本机mysql了; >> grant all privileges on *.* to root@"%" identified by "123456" ; //设置用户root,可以在远程访问mysql >> select host,user from user; //查询mysql中所有用户权限 关闭root用户远程访问权限 >> delete from user where user="root" and host="%" ; //禁止root用户在远程机器上访问mysql >> flush privileges ; //修改权限之后,刷新MySQL的系统权限相关表方可生效