1、运行nid,显示如下参数：
oracle@mydb 2014_02_15]$ nid
DBNEWID: Release 11.2.0.3.0 - Production on Sun Feb 16 00:10:38 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Keyword Description (Default)
TARGET Username/Password (NONE) - --指定数据库的用户名和密码
DBNAME New database name (NONE) ---创建新的数据库名以及DBID
LOGFILE Output Log (NONE)
REVERT Revert failed change NO
SETNAME Set a new database name only NO ---如果只更改数据库名，请指定SETNAME=Y
APPEND Append to output log NO
HELP Displays these messages NO
2、查出原来的DBID=2217289411
sys@OCM> SELECT NAME,DBID FROM V$DATABASE;
NAME DBID
OCM 2217289411
3、关闭数据库并启动到MOUNT
sys@OCM> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
sys@OCM> startup mount;
ORACLE instance started.
Total System Global Area 1006809088 bytes
Fixed Size 2233520 bytes
Variable Size 478153552 bytes
Database Buffers 419430400 bytes
Redo Buffers 106991616 bytes
Database mounted.
4、在LINUX命令提示符中运行nid命令，这里只更改DBID
sys@OCM> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
You have new mail in /var/spool/mail/oracle
[oracle@mydb ~]$ nid target=system/oracle
DBNEWID: Release 11.2.0.3.0 - Production on Sun Feb 16 00:19:12 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to database OCM (DBID=2217289411)
Connected to server version 11.2.0
Control Files in database:
/u01/app/oracle/oradata/ocm/control01.ctl
/u01/app/oracle/oradata/ocm/control02.ctl
Change database ID of database OCM? (Y/[N]) => y
Proceeding with operation
Changing database ID from 2217289411 to 2222218432
Control File /u01/app/oracle/oradata/ocm/control01.ctl - modified
Control File /u01/app/oracle/oradata/ocm/control02.ctl - modified
Datafile /u01/app/oracle/oradata/ocm/system01.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/sysaux01.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/undotbs01.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/users01.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/example01.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/tp1.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/tp2.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/tp3.db - dbid changed
Datafile /u01/app/oracle/oradata/ocm/temp01.db - dbid changed
Control File /u01/app/oracle/oradata/ocm/control01.ctl - dbid changed
Control File /u01/app/oracle/oradata/ocm/control02.ctl - dbid changed
Instance shut down
Database ID for database OCM changed to 2222218432.
All previous backups and archived redo logs for this database are unusable.
Database has been shutdown, open database with RESETLOGS option.
Succesfully changed database ID.
DBNEWID - Completed succesfully.
5、使用resetlogs打开数据库
[oracle@mydb ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Sun Feb 16 00:20:36 2014
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to an idle instance.
idle> startup mount;
ORACLE instance started.
Total System Global Area 1006809088 bytes
Fixed Size 2233520 bytes
Variable Size 478153552 bytes
Database Buffers 419430400 bytes
Redo Buffers 106991616 bytes
Database mounted.
idle> alter database open resetlogs;
Database altered.
6、查看数据库的DBID
idle> SELECT NAME,DBID FROM V$DATABASE;
NAME DBID
OCM 2222218432
由原来的DBID=2217289411变为DBID=2222218432.
