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之前在電腦里安裝了MySQL57之后，一直沒用，卻忘記了root密碼，

在網上找了一些資料修改root密碼，卻一直出錯。直到試到這個：

用管理員權限打開CMD

CD C:\Program Files\MySQL\MySQL Server 5.7\bin

net stop mysql57

mysqld --skip-grant-tables

再另外打開一個管理員權限的CMD

CD C:\Program Files\MySQL\MySQL Server 5.7\bin

mysql

mysql> use mysql

mysql> update mysql.user set authentication_string=PASSWORD('yourpassword') where user='root';

mysql> flush privileges;

mysql> quit

Bye

OK，用新密碼登陸即可：

C:\Program Files\MySQL\MySQL Server 5.7\bin>mysql -u root -p

Enter password: ************

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

Your MySQL connection id is 10

Server version: 5.7.15 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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.

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