oracle change user password

Overview

Oracle Database is a data management system suitable for a variety of applications. Users in the database can access and operate the database. In some cases, the database user password needs to be changed, such as password leakage or the need to change the password regularly. This article will introduce how to change user passwords in Oracle database.

Steps

In Oracle database, you can use the following steps to change the user password:

1. Log in to the database as a system administrator

First, as Log in to the database as a user with system administrator rights. Enter a valid username and password at the username and password prompt to connect you to the database. If necessary, you can use the following command to log in:

sqlplus "/ as sysdba"

2. Select the user to change the password

After connecting to the database, select the user who needs to change the password. For example, the following is the default administrator user sys related to the system administrator:

alter user sys identified by <new password>;
alter user system identified by <new password>;

3. Change the user password

Use the following command to change the user password:

ALTER USER <用户名> IDENTIFIED BY <新密码>;

For example , to change the password of user Tom to the new password 123456, use the following command to change:

ALTER USER Tom IDENTIFIED BY 123456;

After using this command, Oracle will immediately change the password of user Tom. At the same time, it should be noted that in the Oracle database, user passwords must be at least 8 characters, including at least one special character, at least one number, and at least one uppercase letter, to ensure password strength.

4. Verify password change

After changing the password, you can use the following command to verify whether the password has been changed:

SELECT username, account_status FROM dba_users WHERE username = '<用户名>';

If the password has been changed successfully, you should see the user status is OPEN, indicating that the user can access the database.

Summary

In Oracle database, changing user password is an important management task. When administrators change user passwords, they should pay attention to ensuring that the new password complies with security standards to ensure database security. With the method described in this article, administrators can easily change user passwords and verify whether the password change was successful.

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