oracle 死锁

--查用户名，查客户端机器SELECT distinct  s.username,s.MACHINE, s.sid||','||s.serial#    FROM gv$session s, gv$lock l, dba_objects o   WHERE l.sid = s.sid     AND l.id1 = o.object_id(+)         AND s.username is NOT NULL      and s.MACHINE = 'WORKGROUP\PC-201301201414'     --这个SQL可以查看哪个用户用什么方式锁住了哪些表,使用的哪个Session。SELECT   s.username,S.MACHINE,s.SQL_EXEC_START,         decode(l.type, 'TM', 'TABLE LOCK', 'TX', 'ROW LOCK', NULL) LOCK_LEVEL,         o.owner,         o.object_name,         o.object_type,         s.sid,         s.serial#,         s.sid||','||s.serial#    FROM gv$session s, gv$lock l, dba_objects o   WHERE l.sid = s.sid     AND l.id1 = o.object_id(+)     AND s.username is NOT NULL     AND (s.username='' or s.username = 'TPSC_TEST' or s.username = '') --'TPSC'   TPSC_TEST  --必须要大写