SELECT p.spid, a.serial#, c.object_name, b.session_id, b.oracle_username,

       b.os_user_name

  FROM v$process p, v$session a, v$locked_object b, all_objects c

 WHERE p.addr = a.paddr AND a.process = b.process

       AND c.object_id = b.object_id

SELECT sid, serial#, username, osuser FROM v$session  where osuser = 'tangpj'

 alter system kill session 'sid,serial#';