If you forget your Oracle 11g database password, don't worry, you can reset it by following the steps below.
First, log in to your operating system as an administrator. Then, open a command prompt or terminal window (if you're using Linux or macOS). In Windows systems, you can open the command prompt through "Start Menu - All Programs - Accessories - Command Prompt".
Next, switch to the installation directory of Oracle 11g. In Windows systems, the default installation directory is "C:\app\username\product\11.2.0\dbhome_1\bin", where "username" is your Windows username. In Linux or macOS systems, the default installation directory is "/u01/app/username/product/11.2.0/dbhome_1/bin", where "/u01" is the default Oracle installation root directory.
Enter the following command in the installation directory:
sqlplus /nolog
This will open the command line interface of the SQL*Plus tool, which you can use to connect to your local Oracle database instance.
Next, enter the following command to connect to the default administrator account "sys":
conn sys as sysdba
The command will prompt you to enter the password for the administrator account. Since you have forgotten your password, you can reset the administrator account password by following the steps below.
First execute the following command:
alter user sys identified by 新密码;
This will change the password of the administrator account "sys" to the new password you specified.
Next, execute the following command:
startup;
This will start the Oracle database instance. You can verify successful connection to the database instance by executing the following command:
select instance_name from v$instance;
If you see output for the instance name, you have successfully connected to the Oracle database instance.
You can now log in to the Oracle database using the new password for the administrator account "sys" and make any necessary changes to other users or set new passwords.
In conclusion, forgetting your Oracle 11g database password is not a big problem and you can reset it in simple steps. Be sure to keep your password safe to avoid similar problems from happening again.
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