Change user password oracle

Oracle database is a very powerful database management system that can be used to store and manage large-scale data. When using Oracle database, in order to ensure security and protect data integrity, it is recommended to regularly change the password of the database user. This article will introduce the methods and steps on how to change the Oracle database user password.

1. Connecting to Oracle Database

Before you start changing the Oracle database user password, you first need to connect to the Oracle database using valid user credentials. If you are a database administrator or have sufficient rights, you can connect to the database using the administrator user and change the passwords of other users. If you are just a regular user and need to change your password, you can use your own username and password to connect to the database.

2. Use the ALTER USER statement to change the password

Once connected to the Oracle database, you can use the ALTER USER statement to change the user password. The ALTER USER statement is used to change the attributes of an existing Oracle database user, such as password. The following is the syntax of the ALTER USER statement to change the password:

ALTER USER username IDENTIFIED BY new_password;

where username is the name of the database user whose password you want to change, and new_password is the new password.

For example, if you want to change the password of the database user named "user1" to "newpassword", you can use the following command:

ALTER USER user1 IDENTIFIED BY newpassword;

Note: When using the ALTER USER statement to modify the password , Oracle Database will verify the complexity and security of the new password.

3. Use SQL*Plus to change password

SQLPlus is an interactive command line tool used to interact with Oracle databases. It can be used to change the password of an Oracle database user. The following are the steps to change the password using SQLPlus:

Step 1: Use SQL*Plus to log in to the Oracle database. Enter the following command in the command line window:

sqlplus sys/sys_password@service_name as sysdba

Among them, sys is the database administrator user name, sys_password is the password of the administrator user, and service_name is the database service name.

Step 2: Use the ALTER USER statement to change the password. In a SQL*Plus session, use the following syntax to change a user's password:

ALTER USER username IDENTIFIED BY new_password;

For example, to change the password of a database user named "user1" to "newpassword", use the following command:

ALTER USER user1 IDENTIFIED BY newpassword;

Step 3: Exit SQLPlus. After completing the password change, use the following command to exit SQLPlus:

exit;

4. Use Oracle Enterprise Manager to change the password

Oracle Enterprise Manager is a part of Oracle database management A graphical tool that provides an intuitive interface for managing and monitoring Oracle databases. The following are the steps to change the user password using Oracle Enterprise Manager:

Step 1: Log in to Oracle Enterprise Manager. Enter the following URL in the web browser to open the Oracle Enterprise Manager login interface:

http://hostname:port/em

where hostname is the host name of the Oracle database server, and port is the port number of the Oracle Enterprise Manager server.

Step 2: Select the user whose password you want to change. Under the Administration tab, select Security → Users.

Step 3: On the Users page, click the name of the user whose password you want to change.

Step 4: Click the "Edit" button. On the User Information page, click the Edit button.

Step 5: On the Edit User page, enter your new password. In the Password field, enter a new password, and in the Repeat Password field, enter the password again to confirm consistency.

Step 6: Save changes. Click the "Apply Changes" button to save the password changes. Now, you have successfully changed the password of the Oracle database user.

Summary

Oracle database is a widely used relational database management system with powerful functions and flexibility. In order to ensure the security and integrity of the database, it is recommended to regularly change the password of the database user. You can use the ALTER USER statement, SQL*Plus commands, and Oracle Enterprise Manager to modify the Oracle database user password. Becoming familiar with these methods can help you better manage and protect your Oracle database.

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