一、查看锁表语句

SELECT
	sess.sid,
	sess.serial#,
	lo.oracle_username, -- 登陆账号名称
	lo.os_user_name,    -- 登录电脑名称
	ao.object_name,     -- 被锁表名
	lo.locked_mode      -- 死锁级别
FROM
	v$locked_object lo,
	dba_objects ao,
	v$session sess 
WHERE
	ao.object_id = lo.object_id 
	AND lo.session_id = sess.sid;

死锁级别：

二、解锁语句

alter system kill session '68,51'; -- 分别为SID和SERIAL#号

三、查看引起锁表的Sql语句

SELECT
	A.USERNAME,
	A.MACHINE,
	A.PROGRAM,
	A.SID,
	A.SERIAL#,
	A.STATUS,
	C.PIECE,
	C.SQL_TEXT 
FROM
	V$SESSION A,
	V$SQLTEXT C 
WHERE
	A.SID IN ( SELECT DISTINCT T2.SID FROM V$LOCKED_OBJECT T1, V$SESSION T2 WHERE T1.SESSION_ID = T2.SID ) 
	AND A.SQL_ADDRESS = C.ADDRESS ( + ) 
ORDER BY
	C.PIECE;