The first step: Turn off mysql database
Use administrator mode to open a command window breaks.
Into the bin mysql installation directory under the directory, and then enter the closed net stop mysql mysql database
Step Two: Start to skip the certification authority database
Enter mysqld --skip-grant-tables to skip the certification authority to start the database, note that if there is no response to this command is likely to fail in the current database version, use the mysqld --console --skip-grant-tables --shared -memory can to solve the problem .
Step 3: Connect database permissions
Use administrator mode to open a new command window breaks , then enter the mysql installation bin directory of the file folder, you can enter the input mysql mysql database.
Then you can make use mysql database access rights.
Step Four: Modify the database connection password
- If mysqld --skip-grant-tables employed in your command of the second stage is skipped certification authority, the input update user set password = password ( "123456") where user = "root";.
- 如果你采用的是mysqld --console --skip-grant-tables --shared-memory命令，则输入alter user ‘root’@‘localhost’ identified by ‘123456’; 。注意在这里使用这个命令时报错ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement。
需要刷新权限表，输入命令flush privileges;。注意：以上命令不要丢掉结尾分号。
在输入上述的alter user ‘root’@‘localhost’ identified by ‘123456’; 命令即可。
注意：123456为新密码，可根据自己要求自行修改，root为用户名，我修改的为本地数据库密码。
到这里mysql本地数据库密码就修改成功了。
第五步：退出数据库并使用新密码登录数据库
输入quit即可退出数据库
修改 root 密码后，需要执行下面的语句和新修改的密码。不然开启 mysql 时会出错。
可以在打开一个新的cmd窗口，进入MySQL的安装目录下的bin目录，输入mysqladmin -u root -p shutdown，然后输入你刚修改的新密码，回车。
然后在输入net start mysql重启数据库。
结束！！！
Reference article:
http://zwd596257180.gitee.io/blog/2019/04/16/mysql_change_password/
https://blog.csdn.net/qq_33337277/article/details/81454700
https://www.cnblogs.com/ qianzf / p / 6995376.html
