详解在数据库中Oracle如何解锁
欢迎进入Oracle社区论坛,与200万技术人员互动交流 >>进入 我们这里将介绍Oracle如何解锁,在被锁之后我们也可以利用一些工具来进行解锁。下面大家就一同来了解Oracle如何解锁吧。 我们在操作数据库的时候,有时候会由于操作不当引起数据库表被锁定,这么我
欢迎进入Oracle社区论坛,与200万技术人员互动交流 >>进入
我们这里将介绍Oracle如何解锁,在被锁之后我们也可以利用一些工具来进行解锁。下面大家就一同来了解Oracle如何解锁吧。
我们在操作数据库的时候,有时候会由于操作不当引起数据库表被锁定,这么我们经常不知道Oracle如何解锁,不知怎么给这些表解锁,在pl/sql Developer工具的的菜单“tools”里面的“sessions”可以查询现在存在的会话,但是我们很难找到那个会话被锁定了,想找到所以被锁的会话就更难了,下面这叫查询语句可以查询出所以被锁的会话。如下:
1.SELECT sn.username, m.SID,sn.SERIAL#, m.TYPE,
2. DECODE (m.lmode,
3. 0, \'None\',
4. 1, \'Null\',
5. 2, \'Row Share\',
6. 3, \'Row Excl.\',
7. 4, \'Share\',
8. 5, \'S/Row Excl.\',
9. 6, \'Exclusive\',
10. lmode, LTRIM (TO_CHAR (lmode, \'990\'))
11. ) lmode,
12. DECODE (m.request,
13. 0, \'None\',
14. 1, \'Null\',
15. 2, \'Row Share\',
16. 3, \'Row Excl.\',
17. 4, \'Share\',
18. 5, \'S/Row Excl.\',
19. 6, \'Exclusive\',
20. request, LTRIM (TO_CHAR (m.request, \'990\'))
21. ) request,
22. m.id1, m.id2
23. FROM v$session sn, v$lock m
24. WHERE (sn.SID = m.SID AND m.request != 0) --存在锁请求,即被阻塞
25. OR ( sn.SID = m.SID --不存在锁请求,但是锁定的对象被其他会话请求锁定
26. AND m.request = 0
27. AND lmode != 4
28. AND (id1, id2) IN (
29. SELECT s.id1, s.id2
30. FROM v$lock s
31. WHERE request != 0 AND s.id1 = m.id1
32. AND s.id2 = m.id2)
33. )
34.ORDER BY id1, id2, m.request;
通过以上查询知道了sid和 SERIAL#就可以用了
1.alter system kill session \'sid,SERIAL#\';

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