MySQL8忘記密碼如何修改

以管理員方式運行cmd窗口

執行net stop mysql關閉mysql服務

執行mysqld --console --skip-grant-tables --shared-memory進入無密碼啓動MySQL服務

這是這個cmd窗口不能動了

新開一個cmd窗口（以管理員身份運行）

輸入命令mysql.exe -u root無密碼登陸

將密碼設置爲空： UPDATE mysql.user SET authentication_string='' WHERE user='root' and host='localhost';

退出之後再重新登陸

mysql -u root -p 直接回車以空密碼登陸

修改root用戶密碼：alter user user() identified by 'root';

C:\Windows\system32>mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.11

Copyright (c) 2000, 2018, 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.

mysql> use mysql;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> alter user user() identified by 'root';
Query OK, 0 rows affected (0.07 sec)

mysql> use mysql;
Database changed
mysql> quit
Bye