rollback another user's transaction

[gandolf989]

Is there any other way to find the SQL because of which other sessions are blocked?

SYS@outreach AS SYSDBA> select * from dba_blockers;

no rows selected

Elapsed: 00:00:00.09
SYS@outreach AS SYSDBA> select * from dba_Waiters;

no rows selected

Elapsed: 00:00:00.01