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详解在数据库中Oracle如何解锁

Jun 07, 2016 pm 03:15 PM
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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#\';

详解在数据库中Oracle如何解锁

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