在MySql的使用过程中，碰到“Access denied for user ‘root‘@‘IP‘ (using password:YES)”的问题，使用以下语句修改后还是不行。
GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘password‘ WITH GRANT OPTION; FLUSH PRIVILEGES;
最后是通过以下步骤修改就不报错了。
1、开始 → 搜索栏里面输入cmd → 右键cmd.exe选择以管理员的身份运行
2、输入net stop mysql停止MySQL服务
3、输入命令行来到mysql的bin目录下，输入下列粗体命令
D:\MySQL\bin>mysqld --defaults-file="D:\MySQL\my.ini" --console --skip-grant-tables
等一下，显示出以下结果说明MySQL启动:
170215 22:26:09 [Warning] The syntax ‘--log‘ is deprecated and will be removed inMySQL 7.0. Please use ‘--general_log‘/‘--general_log_file‘ instead.
170215 22:26:09 [Warning] The syntax ‘--log_slow_queries‘ is deprecated and will be removed in MySQL 7.0. Please use ‘--slow_query_log‘/‘-- slow_query_log_file‘ instead.
170215 22:26:09 [Warning] The syntax ‘--log‘ is deprecated and will be removed in MySQL 7.0. Please use ‘--general_log‘/‘--general_log_file‘ instead.
170215 22:26:09 [Warning] The syntax ‘--log_slow_queries‘ is deprecated and will be removed in MySQL 7.0. Please use ‘--slow_query_log‘/‘--slow_query_log_file‘ instead.
170215 22:26:09 [ERROR] The update log is no longer supported by MySQL in version 5.0 and above. It is replaced by the binary log. Now starting MySQL with --log-bin=‘‘ instead.
170215 22:26:09 InnoDB: Started; log sequence number 0 324221
170215 22:26:09 [Note] mysqld: ready for connections.Version: ‘5.1.33-community-log‘ socket: ‘‘ port: 3306 MySQL Community Server (GPL)
4、再以管理员的身份打开一个cmd.exe，输入命令行来到mysql的bin目录下，输入：mysql -uroot mysql
5、进入mysql之后，输入命令行修改密码：
mysql>update user set authentication_string=password(‘123456‘) where user=‘root‘；
6、刷新权限：mysql>flush privileges;
7、退出mysql：mysql> quit;
Access denied for user 'root'@'IP' (using password:YES)解决方法
原文地址：https://www.cnblogs.com/foxting/p/9517592.html