通过sid查找sql

这是当前运行的sql语句
select sid,
        v$session.username 用户名,
        last_call_et 持续时间,
        status 状态,
        LOCKWAIT 等待锁,
        machine 用户电脑名,
        logon_time 开始登入时间,
        sql_text
  from v$session, v$process, v$sqlarea
where paddr = addr
    and sql_hash_value = hash_value  
    and status = 'ACTIVE'
    and v$session.username is not null
order by last_call_et desc;
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根据sid查询已经执行过的sql
select sql_text from v$sqlarea a,v$session b where a.SQL_ID=b.PREV_SQL_ID and b.SID=&sid;
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根据sid查询当前执行的sql
select sql_text from v$sqlarea where (hash_value,address)=(select sql_hash_value,sql_address from v$session where sid=&sid);
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查询oracle 锁表情况
select sess.sid,
     sess.serial#,
     lo.oracle_username,
     lo.os_user_name,
     ao.object_name,
     lo.locked_mode
     from v$locked_object lo,
     dba_objects ao,
     v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid
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杀掉锁表的语句
如有記錄則表示有lock，記錄下SID和serial# ，將記錄的ID替換下面的738,1429，即可解除LOCK
alter system kill session '1793,25320';