How to solve the problem of forgetting oracle username and password

When using Oracle database, username and password are very important login credentials. However, due to long-term non-use or other factors, we sometimes forget our username and password, which results in the inability to use the Oracle database normally. Here, this article will introduce the solution when you forget your Oracle username and password to help you solve this common problem.

1. Solutions when you forget your username

1.1 Find your username in Oracle

If you forget your Oracle username, you can use the following steps to find your username in Oracle Find your username in:

Step 1: Open SQL/Plus

Step 2: Enter the following command in SQL/Plus:

conn / as sysdba

Step 3: Enter the following Command:

select username from dba_users;

This will list all user names that exist in Oracle.

1.2 Use external tools to query user names

If you don’t want to use SQL/Plus, you can also use other tools to query user names in Oracle.

Step 1: Create a text file using your favorite text editor.

Step 2: Paste the following text into the text file:

select username from dba_users;

Step 3: Save the text file as "filename.sql".

Step 4: Open a new command prompt window and enter the following command:

sqlplus /nolog @path/filename.sql

Where, "path" is the path where you saved the "filename.sql" file, "filename.sql" is the name of your saved SQL query script.

This will list all user names that exist in Oracle.

2. Solutions when you forget your password

When you forget your Oracle password, you can retrieve your password through the following methods:

2.1 Use SQL/Plus to modify the database Password

The steps to change the Oracle password using SQL/Plus are as follows:

Step 1: Open SQL/Plus

Step 2: Use the above method to connect to the database

Step 3: Then use the following command to change the password:

ALTER USER username IDENTIFIED BY newpassword;

Where "username" is the username you want to change the password for, and "newpassword" is the new password you want to set.

2.2 Use external tools to change the database password

If you do not want to use SQL/Plus, you can also use other tools to change the Oracle password. The following are the steps to change the password using Oracle SQL Developer:

Step 1: Open Oracle SQL Developer and select Connection.

Step 2: In the "Connection" drop-down menu, select "Change Password".

Step 3: Fill in the "User Name", "Old Password", "New Password" and confirm the new password. Then click Apply.

Note: Oracle SQL Developer will not directly display the old password by default. You need to enter the old password to change the password.

In this way, you can retrieve your forgotten password in Oracle.

Summary

This article introduces the solution when you forget your Oracle user name and password. If you encounter this situation, you can use the methods provided in this article to recover your username and password. In the future, it is recommended that you back up and record your Oracle username and password in a timely manner to ensure smooth use of the Oracle database.

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