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create table test(a number,b number);
insert into test values(1,2);
insert into test values(3,4);
insert into test values(8,9);
commit;
---session 1 Ä£ÄâÑ¡ÖÐÒ»¸öºÅÂë
SQL> select * from test where a =1 for update skip locked;
         A          B
---------- ----------
         1          2
---session 2 ¶Ôa=1ÔÙ½øÐÐselect
SQL> select * from test where a = 1 for update skip locked;
δѡ¶¨ÐÐ
-- session 3 È«±íselect
SQL> select * from test for update skip locked;
         A          B
---------- ----------
         3          4
         8          9
SQL>
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SELECT  s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
from v$session s,v$lock l,all_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT Null
Èý¡¢²é³ö±»ËøµÄ±í£¬ºÍËøסÕâ¸ö±íµÄ»á»°ID
select a.session_id ,b.* from v$locked_object a,all_objects b
where a.object_id=b.object_id
ËÄ¡¢ ²é³ö¶ÔÓ¦µÄSQLÓï¾ä
select vs.SQL_TEXT,vsess.sid,vsess.SERIAL#,vsess.MACHINE,vsess.OSUSER
,vsess.TERMINAL,vsess.PROGRAM,vs.CPU_TIME,vs.DISK_READS
from v$sql vs,v$session vsess
where vs.ADDRESS=vsess.SQL_ADDRESS
and vsess.sid=(ÉÏÃæ²é³öÀ´µÄ»á»°ID)
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²éV$DB_OBJECT_CACHEÊÓͼ:
SELECT * from V$DB_OBJECT_CACHE WHERE OWNER='¹ý³ÌµÄËùÊôÓû§' AND LOCKS!='0';
2. ²éÊÇÄÄÒ»¸öSID,ͨ¹ýSID¿ÉÖªµÀÊÇÄĸöSESSION.
²éV$ACCESSÊÓͼ: