Oracle数据库锁表的查询方法以及解锁的方法

select t2.username,t2.sid,t2.serial#,t2.logon_time 
from v$locked_object t1,v$session t2 
where t1.session_id=t2.sid order by t2.logon_time

alter system kill session ‘382,1125‘

select dba_objects.object_name,
 v$locked_object.oracle_username,
v$locked_object.os_user_name,
v$locked_object.locked_mode,v$session.process,v$session.program,
v$session.sid,serial# from v$locked_object,dba_objects,
v$session where v$locked_object.object_id=dba_objects.object_id
 and v$locked_object.session_id=v$session.sid;

--查某session 正在执行的sql语句，从而可以快速定位到哪些操作或者代码导致事务一直进行没有结束等.
SELECT /*+ ORDERED */ 
 sql_text
  FROM v$sqltext a
 WHERE (a.hash_value, a.address) IN
       (SELECT DECODE(sql_hash_value, 0, prev_hash_value, sql_hash_value),
               DECODE(sql_hash_value, 0, prev_sql_addr, sql_address)
          FROM v$session b
         WHERE b.sid = ‘233‘)  /* 此处233 为SID*/
 ORDER BY piece ASC;