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1.查询v$database获得由于DBID在控制文件和数据文件中都存在记录,所以如果能够mount数据库就可以查询v$database视图获得。SQL> alter database mount;Database altered.SQL> select dbid from v$database;
       DBID
 ----------
 1363251591Oracle 10g中获取DBID http://www.linuxidc.com/Linux/2011-10/44817.htm在CentOS 6.4下安装Oracle 11gR2(x64) http://www.linuxidc.com/Linux/2014-02/97374.htmOracle 11gR2 在VMWare虚拟机中安装步骤 http://www.linuxidc.com/Linux/2013-09/89579p2.htmDebian 下 安装 Oracle 11g XE R2 http://www.linuxidc.com/Linux/2014-03/98881.htm2.在nomount状态时如果数据库配置了自动控制文件备份(Oracle9i),并且名称是缺省的,那么我们可以从自动备份文件获得DBID.[oracle@jumper dbs]$ cd $ORACLE_HOME/dbs
 [oracle@jumper dbs]$ ll c-*
 -rw-r----- 1 oracle dba 3375104 Dec 21 11:13 c-1363251591-20051221-00
 -rw-r----- 1 oracle dba 3358720 Jan 21 14:03 c-1363251591-20060121-00
 -rw-r----- 1 oracle dba 3358720 Jan 21 14:08 c-1363251591-20060121-01这里的1363251591就是DBID。在10g中,使用Flash Recovery Area,则没有这个命名规则。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-1363251591-20051221-00";
 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更多详情见请继续阅读下一页的精彩内容: http://www.linuxidc.com/Linux/2014-07/104666p2.htm
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