SYSDBA password in Oracle DB

oraclesqlplus

I am connecting to Oracle DB using sysdba:

sqlplus / as sysdba

What is the default password for sysdba user. I tried in net and found out the default password is change_on_install but it is not working for me.

I am interested to know if Oracle DB maintains some file or DB table where it stores the passwords.

Best Answer

SYSDBA is not a user, it is a system privilege. When you connect as / you are connecting to the SYS user. You don't need a password when you connect as you are - as long as it's a local connection from an OS account in the DBA group.

You haven't said what happens when you try to connect, or why you think you need a password; possibly that is that failing (in which case giving the error message would be helpful) and giving you a SQL*Plus login prompt, maybe indicating you aren't in that group.

Passwords are stored within the DB, the exact location depends on version; but they're stored hashed (of course) so you're not going to be able to get the actual passwords in plaintext (without a lot of time and effort anyway).

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Oracle 11g SYSDBA login

It depends on the GUI but they all should have a way of selecting the SYSDBA privilege. Toad has it appear as a drop-down box called 'Connect as:' as does Oracle Enterprise Manager. For SQL Developer you use the 'Role' box when creating a new connection.

As far as / as sysdba is concerned it just means that operating system authentication is being used so no password is needed. You can only use it if you are logged in as the oracle user or a member of the dba group (or for Windows, I believe as an administrator).

When you grant a user the SYSDBA privilege it only means they have the option to log in with the SYSDBA privilege and not that they will have dba privileges when they log in normally. The same is true for the SYS user: you can log in as SYS without the SYSDBA privilege and so lack the ability to shutdown the database, for example.

Unable to login oracle as sysdba

The problem was I was using the variable TWO_TASK. Once I unset the variable, I nolonger had issues logging in a sysdba.

$ unset TWO_TASK
$ sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on Wed Feb 6 02:51:55 2013

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup;
ORACLE instance started.

Total System Global Area 1707446272 bytes
Fixed Size          1336988 bytes
Variable Size         989858148 bytes
Database Buffers      704643072 bytes
Redo Buffers           11608064 bytes
Database mounted.
Database opened.
SQL> exit

I found the answer here.

Best Answer

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