rollback another user's transaction

[mahajanakhil198]

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

seem

seems u haven't got it exactly. i want to find the blocking SQL, not the SQL to find the blocked sessions.