MySQL重置密码

网上都有，大家可以试一试：

第一种：

mysql> use mysql

Database changed

mysql> update user set authentication_string=password('123456') where user='root';

Query OK, 0 rows affected, 1 warning (0.06 sec)

Rows matched: 1  Changed: 0  Warnings: 1

截图：

第一种可能失败，第二种如下。

D:\mysql-8\mysql-8.0.16-winx64\bin>mysqladmin -uroot -p旧的密码 password 新密码
mysqladmin: [Warning] Using a password on the command line interface can be insecure.
Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety. 

另外，忘记密码怎么修改呢？

1. 打开一个cmd窗口输入mysqld --skip-grant-tables，注意这个cmd命令窗口不要关闭
2. 重新打开一个cmd窗口：（这是我是配置了环境变量的，大家按照需求进去mysql就可以（不需要输入账号密码））

   C:\Users\Administrator>mysql

   Welcome to the MySQL monitor.  Commands end with ; or \g.

   Your MySQL connection id is 4

   Server version: 5.7.19 MySQL Community Server (GPL)

   Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

   Oracle is a registered trademark of Oracle Corporation and/or its

   affiliates. Other names may be trademarks of their respective

   owners.

   Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.