I have forgotten my Oracle username and password and hence not able to use it. My Oracle version is 11.2.0.1.0(11g). I consulted Internet. They asked me to execute commands like ‘SYSDBA’ but I was unable to do it as once I give ‘SYSDBA’ on Command Prompt screen, it takes the command as the username and next asks for password. I cannot execute any commands suggested by them as whatever I enter is taken as the username, subsequently password is asked and error occurs.
This question is related to
oracle11g
sqlplus / as SYSDBA
ALTER USER existing_account_name IDENTIFIED BY new_password ACCOUNT UNLOCK;
The usernames are shown in the dba_users's username
column, there is a script you can run called:
alter user username identified by password
You can get more information here - https://community.oracle.com/thread/632617?tstart=0
Go to SQL command line:- type:
sql>connect / as sysdba;
then type:
sql>desc dba_users;
then type:
sql>select username,password from dba_users;
If sysdba
doesn't work then try connecting with username:scott and password: Tiger
You will be able to see all users with passwords. Probably you might find your's. Hope this helps
Open your SQL command line and type the following:
SQL> connect / as sysdba
Once connected,you can enter the following query to get details of username and password:
SQL> select username,password from dba_users;
This will list down the usernames,but passwords would not be visible.But you can identify the particular username and then change the password for that user. For changing the password,use the below query:
SQL> alter user username identified by password;
Here username is the name of user whose password you want to change and password is the new password.
if you are on Windows
sqlplus / as sysdba
Now you are logged with SYS user and you can do anything you want (query DBA_USERS to find out your username, or change any user password). You can not see the old password, you can only change it.
Source: Stackoverflow.com