---查询锁表（查出后，再执行查询结果进行释放；可多次查询，存在循环锁表的情况）--
select 'alter system kill session '|| ''''|| sess.sid || ',' || sess.serial# || ''''|| ';'
from v$locked_object lo,
dba_objects ao,
v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid;