Select on Oracle view returns no rows

The view may be limiting results based on who is executing it.  This is called Label Security (I believe).

Try querying the view when logged into the database as the same use that the application uses.

I tried that as well, still shows no rows.

Sounds like somehow your database is restricting access to certain applications. Like slightwv mentioned, a Label Security (add-on that cost money) or perhaps a VPD (Virtual Private Database) which is free with Enterprise Edition.

For example, if you create the following view and query it from SQL Developer, you'll get no rows returned, whereas if you use SQL*Plus it will return 'X'

create view dual2 as select * from dual where sys_context('USERENV', 'MODULE') != 'SQL Developer'
/
select * from dual2
/

What you need to do to test this theory, is go to the application where you see the data and run the following query:

SELECT sys_context('USERENV', 'MODULE') FROM DUAL;

Then set your module and select from the view again to see if it works:

EXEC DBMS_APPLICATION_INFO.SET_MODULE( module_name => '<Result from above query goes here>', action_name => 'Testing');
/

>>I tried that as well, still shows no rows.

If you are logged into the database with the same user as the application and it still doesn't work it limits the possibility:

1:  You aren't using the same view the application is using
2:  Different database?
3:  As shown above:  You are limiting the rows based on program calling it, machine it is being called from or something else.

I would check with the developers/DBAs or someone that understands how the database works with the application.

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