Oracle HowTo:如何获得数据库的DBID

[oracle@jumper dbs]$ cd $ORACLE_HOME/dbs
[oracle@jumper dbs]$ ll c-*
-rw-r----- 1 oracle dba 3375104 Dec 21 11:13 c-3152029224-20051221-00
-rw-r----- 1 oracle dba 3358720 Jan 21 14:03 c-3152029224-20060121-00
-rw-r----- 1 oracle dba 3358720 Jan 21 14:08 c-3152029224-20060121-01

这里的3152029224就是DBID.

3.从自动备份中恢复

需要或缺DBID进行恢复通常是因为丢失了所有的控制文件.在恢复时会遇到错误.

[oracle@jumper dbs]$ rman target  /

Recovery Manager: Release 9.2.0.4.0 - Production

Copyright (c) 1995, 2002, Oracle Corporation.  All rights reserved.

connected to target database: conner (not mounted)

RMAN> restore controlfile from autobackup;

Starting restore at 05-FEB-06

using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=11 devtype=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 02/05/2006 20:47:25
RMAN-06495: must explicitly specify DBID with SET DBID command

如果存在自动备份,我们通常可以直接恢复控制文件,mount数据库之后就好办了:

RMAN> restore controlfile from '/opt/oracle/product/9.2.0/dbs/c-3152029224-20051221-00';

Starting restore at 05-FEB-06

using channel ORA_DISK_1
channel ORA_DISK_1: restoring controlfile
channel ORA_DISK_1: restore complete
replicating controlfile
input filename=/opt/oracle/oradata/conner/control01.ctl
output filename=/opt/oracle/oradata/conner/control02.ctl
output filename=/opt/oracle/oradata/conner/control03.ctl
Finished restore at 05-FEB-06

4.直接从幸存的文件中读取

由于DBID存在于数据文件及控制文件中,所以我们可以通过PL/SQL程序直接从文件中读取:

SQL> select eygle.get_dbid('/opt/oracle/oradata/conner','user02.dbf') from dual;

EYGLE.GET_DBID('/OPT/ORACLE/OR
------------------------------
3152029224

SQL> select dbid from v$database;

DBID
----------
3152029224

这种方法仅为测试兴趣所致,不被推荐.

相关文章参考:

使用Oracle9i的自动控制文件备份功能

使用RMAN的备份及恢复一例-丢失所有控制文件

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这篇【Oracle HowTo:如何获得数据库的DBID】来自 www.eygle.com | CSDN技术网摘| del.icio.us|365Key

By eygle on 2006-02-05 22:43 | Comments (1) | Posted to HowTo | Edit |Pageviews:

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SQL> select eygle.get_dbid('/orahome/oracle/oradata/jyc','abc.dbf') from dual;
select eygle.get_dbid('/orahome/oracle/oradata/jyc','abc.dbf') from dual
*
ERROR at line 1:
ORA-00904: "EYGLE"."GET_DBID": invalid identifier
您这个eygle.get_dbid 内容是什么啊？

Posted by: jyc at August 17, 2007 1:04 PM

www.eygle.com

Oracle HowTo:如何获得数据库的DBID

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