select username,lockwait,status,machine,program from v$session where sid in
 (select session_id from v$locked_object)

select sql_text from v$sql where hash_value in
(select sql_hash_value from v$session where sid in
(select session_id from v$locked_object))

SELECT s.username,l.OBJECT_ID,l.SESSION_ID,s.SERIAL#,
l.ORACLE_USERNAME,l.OS_USER_NAME,l.PROCESS
FROM V$LOCKED_OBJECT l,V$SESSION S WHERE l.SESSION_ID=S.SID;

alter system kill session ‘sid,serial#'; （其中sid=l.session_id）

select pro.spid from v$session ses,
v$process pro
where
ses.sid=XX
and ses.paddr=pro.addr;

SELECT sn.username,
    m.SID,
    sn.SERIAL#,
    m.TYPE,
    DECODE(m.lmode,
       0,
       'None',
       1,
       'Null',
       2,
       'Row Share',
       3,
       'Row Excl.',
       4,
       'Share',
       5,
       'S/Row Excl.',
       6,
       'Exclusive',
       lmode,
       LTRIM(TO_CHAR(lmode, '990'))) lmode,
    DECODE(m.request,
       0,
       'None',
       1,
       'Null',
       2,
       'Row Share',
       3,
       'Row Excl.',
       4,
       'Share',
       5,
       'S/Row Excl.',
       6,
       'Exclusive',
       request,
       LTRIM(TO_CHAR(m.request, '990'))) request,
    m.id1,
    m.id2
 FROM v$session sn, v$lock m
 WHERE (sn.SID = m.SID AND m.request != 0) --存在锁请求，即被阻塞 
  OR (sn.SID = m.SID --不存在锁请求，但是锁定的对象被其他会话请求锁定 
    AND m.request = 0 AND lmode != 4 AND
    (id1, id2) IN (SELECT s.id1, s.id2
             FROM v$lock s
            WHERE request != 0
             AND s.id1 = m.id1
             AND s.id2 = m.id2))
 ORDER BY id1, id2, m.request;