How to change the root password in MySQL

MySQL methods to change the root password include the SET PASSWORD command, backing up data and reinstalling MySQL, and using the mysql.user table to change the user password. Detailed introduction: 1. The SET PASSWORD command can reset the user's set_user_id column value. The format is "set password for username @set_user_id=new_password", where username is the username whose password is to be changed, etc.

In MySQL, the password of the root user is very important because it has system administrator rights and can perform all operations. If the root user password is lost or leaked, it will pose a serious threat to database security. Therefore, it is very important to change the root user password in time.

The following are several methods to modify the MySQL user password:

SET PASSWORD command, the SET PASSWORD command can reset the user's set_user_id column value.

SET PASSWORD command format set password for username @set_user_id=new_password, where username is the username whose password is to be modified, set_user_id is the set_user_id value of the new password, and new_password is the new password to be modified.

For example, to change the root user password, you can execute the following command:

set password for root @1=md5('new_password');

Where, 'new_password' is the new password to be set.

Back up the data and reinstall MySQL

If the above method cannot change the root user password, you may consider backing up the data and reinstalling MySQL. Before reinstalling, you need to stop the MySQL service and back up your data. Then uninstall MySQL and reinstall it. After the installation is complete, you can import the backed up data using the root user and new password.

Use the mysql.user table to modify the user password

You can also modify the user password by modifying the mysql.user table. This table stores MySQL user and password information. You can use the following command to open the table:

use mysql; show tables;

Then execute the following command to modify the root user password:

update user set password=password('new_password') where user='root'; flush privileges;

Where, 'new_password' is the new password to be set.

No matter which method is used, you need to operate with caution when changing the root user password, and make sure to back up the data before operation to prevent data loss. At the same time, to ensure security, it is recommended that you change your password regularly and use a strong password.

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