--查询Oracle正在执行的sql语句及执行该语句的用户
select b.sid oracleID, b.username 登录Oracle用户名, b.serial#, spid 操作系统ID,
paddr, sql_text 正在执行的SQL, b.machine 计算机名 ,b.*
from v$process a, v$session b, v$sqlarea c where a.addr = b.paddr and b.sql_hash_value = c.hash_value;

--检查Oracle是否存在死锁
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;

--检查Oracle死锁的sql
select sql_text from v$sql where hash_value in (select sql_hash_value from v$session
where sid in (select session_id from v$locked_object));

--检查Oracle死锁用户的sql
select b.username, b.serial#, d.id1, a.sql_text from v$lock d, v$session b, v$sqltext a
where b.lockwait = d.kaddr and a.address = b.sql_address
and a.hash_value = b.sql_hash_value;

--查询确定具体是谁锁了谁
select s1.username || '@' || s1.machine || ' ( SID=' || s1.sid ||' ) is blocking ' || s2.username || '@' || s2.machine || ' ( SID=' ||s2.sid || ' ) ' AS blocking_status
from v$lock l1, v$session s1, v$lock l2, v$session s2 where s1.sid = l1.sid and s2.sid = l2.sid and l1.BLOCK = 1 and l2.request > 0
and l1.id1 = l2.id1 and l2.id2 = l2.id2;

--查询SQL的执行进度
select se.sid,opname,trunc(sofar / totalwork * 100, 2) || '%' as pct_work,elapsed_seconds elapsed,round(elapsed_seconds * (totalwork - sofar) / sofar) remain_time,sql_text
from v$session_longops sl, v$sqlarea sa, v$session se where sl.sql_hash_value = sa.hash_value and sl.sid = se.sid and sofar != totalwork and sofar>0 order by start_time;

--查询Oracle死锁的进程
SELECT s.username,l.OBJECT_ID,l.SESSION_ID,s.SERIAL#,
l.ORACLE_USERNAME,l.OS_USER_NAME,l.PROCESS
FROM V$LOCKED_OBJECT l,V$SESSION S WHERE l.SESSION_ID=S.SID;

--杀掉导致死锁的进程
alter system kill session 'sid,serial#'; （其中sid=l.session_id）找出sid,serial#号