关于数据库表update时被锁

       在往表中插入数据时，插入不进去，表被锁住了，如何查询是否表被锁呢？

我的笔记：

      查询表被锁信息：

       select sess.sid,

       sess.serial#,

       lo.oracle_username,

       lo.os_user_name,

       ao.object_name,

       lo.locked_mode

  from v$locked_object lo, dba_objects ao, v$session sess

 where ao.object_id = lo.object_id

   and lo.session_id = sess.sid;

   

   select sess.sid,

       sess.serial#,

       lo.oracle_username,

       lo.os_user_name,

       ao.object_name,

       lo.locked_mode,

       ao.owner,

 ao.object_name,

 ao.object_type

  from v$locked_object lo, dba_objects ao, v$session sess

 where ao.object_id = lo.object_id

   and lo.session_id = sess.sid;

 

alter system kill session 'sid,serial#';