How to find all users who have sysdba privileges?

How to find all users who have sysdba privileges?
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Wasim Akram ShaikCommented:
Its not really that simple to answer..
to start with you can check out the users who have sysdba privilege via the data dictionary

select * from v$pwfile_users;

but however a root user(super user) or a daemon user /shadow user to root who have root permissions can easily switch to oracle user and can always behave as a sysdba

so basically os authenticated users cannot be shown up by this way, you actually need to check out at your os level who all are basically falling into dba group.

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DavidSenior Oracle Database AdministratorCommented:
You might get a partial answer with a query of which users hold the DBA role, or again which users are granted to certain system privileges.  But there are sets of privileges with different levels of permission.  A database operator (not commonly used) might manage backups and recovery, or tablespace management, but be blocked from dropping the entire instance.

Say more about what you need to accomplish, please.
DavidSenior Oracle Database AdministratorCommented:
Rao, do you need any further assistance on this?  Please remember to close your tickets and award points.
Steve WalesSenior Database AdministratorCommented:
I've requested that this question be closed as follows:

Accepted answer: 250 points for Wasim Akram Shaik's comment #a40644409
Assisted answer: 250 points for dvz's comment #a40644586

for the following reason:

This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
Rao_SAuthor Commented:
Thank you, I was able to solve my issue.
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