How to change Oracle password (three methods)

Oracle database administrators often need to change user passwords to ensure database security. If you are an Oracle database administrator, here are several ways to change the Oracle database user password.

Method 1: Use SQL*Plus to change the Oracle user password

1. Log in to the system administrator account

First, log in to the Oracle database system administrator account. You need to use the SQL*Plus command line interface to operate.

2. Connect to the database

Use the following SQL*Plus command to connect to the Oracle database:

sqlplus / as sysdba

This will connect to the database using the system administrator account without a password Oracle database.

3. Query the user whose password you want to modify

Use the following SQL statement to query the user whose password you want to modify:

SELECT username FROM dba_users;

4. Change user password

Use the following SQL statement to modify the user password:

ALTER USER username IDENTIFIED BY new_password;

Please replace username with the user name whose password you want to change, and replace new_password with the user New Password.

5. Exit SQL*Plus

Use the following command to exit SQL*Plus:

exit;

Method 2: Use Oracle Enterprise Manager to change the Oracle user password

1. Log in to Oracle Enterprise Manager

First, log in to Oracle Enterprise Manager.

2. Select the user whose password you want to change

In Oracle Enterprise Manager, select "Database" from the left navigation bar, and then select the user whose password you want to change.

3. Change user password

In the user details page, click the "Change Password" button and enter the new password.

4. Save changes

Click the "Submit" button to save changes.

Method 3: Use PL/SQL to modify the Oracle user password

1. Log in to the Oracle database

Use SQL*Plus or other tools to log in to the Oracle database System administrator account.

2. Create a password change procedure

Use the following PL/SQL statement to create a password change procedure:

CREATE OR REPLACE PROCEDURE change_password (
   p_username    IN  VARCHAR2,
   p_newpassword IN  VARCHAR2
)
IS
BEGIN
   EXECUTE IMMEDIATE 'ALTER USER ' || p_username || ' IDENTIFIED BY ' || p_newpassword;
END;

3. Call the procedure

Use the following PL/SQL statement to call the procedure and pass the username and new password parameters:

EXEC change_password('username', 'new_password');

Please replace username with the username whose password you want to change, and new_password Replace with the user's new password.

Summary:

The above are three commonly used methods to change the Oracle user password. You can use any of these methods to change the Oracle user password. Make sure to only authorize users who need to change their passwords, and use a strong password policy to ensure database security.

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