1.執行一下sql，查詢出被鎖表的session和serial#
select b.username,b.sid,b.serial#,logon_time
from v$locked_object a,v$session b
where a.session_id = b.sid order by b.logon_time
上面的sql語句會查詢出被鎖住的事務，下面根據查詢出的session_id和serial#,把這個事務刪除就可以
2.刪除事務
alter system kill session 'session_id,serial#';
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