How to change username and password in oracle

Oracle is a very powerful database management system that is used by many businesses and organizations to store and manage important data. However, due to security and data protection reasons, administrators need to regularly change the username and password of Oracle users. In this article, we will introduce how to change username and password in Oracle database.

Step 1: Stop the Oracle service

First, you need to stop the running Oracle service. The service can be stopped by running the following command:

sudo systemctl stop oracle

Step 2: Log in using SQLPlus

Next, you need to log in to the Oracle database using SQLPlus to be able to change the username and password. You can log in by running the following command:

sqlplus / as sysdba

After entering the above command, you will see the Oracle database prompt, indicating that you have successfully logged in.

Step Three: Change Username

Now you can change the username of a specific user. Achieve this by running the following command:

ALTER USER username RENAME TO new_username;

In the above command, you need to replace "username" with the username you want to change, and replace "new_username" with the new username you want to change. Executing the above command will change the user's username.

Step 4: Change Password

Next, you need to change the password of this user using the following command:

ALTER USER username IDENTIFIED BY new_password;

In the above command, you need to change "username ” with the username you want to change and “new_password” with the new password you want to set. Executing the above command will change the user's password.

Step 5: Start the Oracle service

After completing all changes, you need to restart the Oracle service. The service can be started by running the following command:

sudo systemctl start oracle

Now you can log back into the Oracle database and use the new username and password.

Conclusion

Changing the username and password of an Oracle user is very simple, but it requires very careful operation to ensure the security and integrity of the data. Before making these changes, make sure your database is backed up and you have a way to restore it.

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