Access denied for user 'root'@'IP' (using password:YES)解决方法

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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:MySQLin>mysqld  --defaults-file="D:MySQLmy.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;

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