How to change password in oracle

Oracle is a very popular database management system. In Oracle, each user has a username and password for accessing the database. Of course, sometimes we also need to change the password. This article will introduce how to change the password in Oracle.

First, we need to log in to the Oracle database. In this article, we will use SQL Plus as a client for Oracle database. Open the terminal and enter the following command:

$ sqlplus username/password@database_name

where username is your username, password is your password, and database_name is the name of the database you want to connect to. If you are using SQL Plus to connect to Oracle for the first time, you need to enter the password of the sys as sysdba and sysdba users for authorization.

Next, enter the following command to change the password:

ALTER USER username IDENTIFIED BY new_password;

where username is the username of the Oracle user whose password you want to change, and new_password is the new password you want to set. For example, if we want to change the password of user wty to 123456, we can enter like this:

ALTER USER wty IDENTIFIED BY 123456;

After executing the above command, the Oracle database will change the password of user wty to 123456. If you want to change the password of the currently logged in user, you can use the following command:

ALTER USER IDENTIFIED BY new_password;

After executing the above command, the Oracle database will change the password of the currently logged in user to new_password.

It should be noted that if the password of your Oracle user expires, you need to change the password before logging in to the Oracle database before you can continue to use the account. At this point, you can use the following command to change your password:

ALTER USER IDENTIFIED BY new_password REPLACE old_password;

where old_password is your old password before expiration, and new_password is the new password you want to set. After executing the above command, the Oracle database will replace the old password with the new password, thereby lifting the password expiration status of the account.

In addition to using the SQL Plus client, you can also use SQL Developer to change the Oracle user's password. In SQL Developer, you need to select the user whose password needs to be changed, then right-click the user and select the "Alter User" option to enter the password modification interface.

To sum up, whether you are using SQL Plus or SQL Developer, you can easily change the password in Oracle. However, we also need to pay attention to the security of passwords, do not use too simple passwords, and do not leak passwords to others to ensure data security.

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