How to change password in Oracle database

Oracle database is a very popular relational database management system. It is a powerful and reliable database solution widely used by enterprises, government agencies and individual users. In order to protect the security of the database, administrators need to frequently change the password of the database. In this article, we will introduce how to change the password in Oracle database.

1. Connecting to the Oracle database

First, we need to connect to the Oracle database through the command line. On Windows, you can use the CMD command line window and then use the following command:

sqlplus /nolog

This will open SQL*Plus.

2. Connect to the database instance

Next, you need to connect to the Oracle database instance. Use the following syntax to connect to a database instance:

conn username/password@database

where username is the username in the Oracle database, password is the corresponding password, and database is the name of the database instance you want to connect to. If you do not specify a database instance to which you can connect, the default instance will be connected.

3. Change password

Once successfully connected to the Oracle database instance, you can use the following command to modify the password of the database user:

alter user username identified by new_password;

Where, username is the user name whose password is to be changed, and new_password is the new password. After successfully changing the password, you will receive the following message:

User altered.

4. Exit the database

After completing the password change, you can use the following command to exit the Oracle database:

exit;

This will close SQL*Plus and exit the database.

Summary

In this article, we have introduced the steps to change the password in Oracle database. It's important to note that changing your password is an important security task and must be done with caution. Following these steps correctly ensures that your database is well-secured.

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