Oracle 修改dbid和dbname

Oracle 修改dbid和dbname

一般没人修改Oracle 的dbid和dbname，除非特殊情况，比如克隆数据库等等

步骤：
1.备份数据库 2.启动数据到mount状态 3.nid命令修改 （如果只是修改dbid，那么不需要dbname参数，需要更改dbname加上此参数即可，如果只修改dbname，那么需要setname参数为yes） 4.alter database open resetlogs打开数据库 nid语法以及参数含义：

Parameter	Description
TARGET	Specifies the username and password used to connect to the database. The user must have the SYSDBA privilege. If you are using operating system authentication, then you can connect with the slash (/). If the $ORACLE_HOME and $ORACLE_SID variables are not set correctly in the environment, then you can specify a secure (IPC or BEQ) service to connect to the target database. A target database must be specified in all invocations of the DBNEWID utility.
REVERT	Specify YES to indicate that a failed change of DBID should be reverted (default is NO). The utility signals an error if no change DBID operation is in progress on the target database. A successfully completed change of DBID cannot be reverted. REVERT=YES is valid only when a DBID change failed.
DBNAME=new_db_name	Changes the database name of the database. You can change the DBID and the DBNAME of a database at the same time. To change only the DBNAME, also specify the SETNAME parameter.
SETNAME	Specify YES to indicate that DBNEWID should change the database name of the database but should not change the DBID (default is NO). When you specify SETNAME=YES, the utility writes only to the target database control files.
LOGFILE=logfile	Specifies that DBNEWID should write its messages to the specified file. By default the utility overwrites the previous log. If you specify a log file, then DBNEWID does not prompt for confirmation.
APPEND	Specify YES to append log output to the existing log file (default is NO).
HELP	Specify YES to print a list of the DBNEWID syntax options (default is NO).

实例： SQL> conn /as sysdba Connected. SQL> select dbid from v$database;   DBID ---------- 148366931 SQL> startup mount; ORACLE instance started.   Total System Global Area 5049942016 bytes Fixed Size 2090880 bytes Variable Size 1375733888 bytes Database Buffers 3657433088 bytes Redo Buffers 14684160 bytes Database mounted. SQL> exit Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options oracle@readerlogdb-> nid target=sys/sys@skyread   DBNEWID: Release 10.2.0.4.0 - Production on Mon Jul 1 11:16:09 2013   Copyright (c) 1982, 2007, Oracle. All rights reserved.   Connected to database SKYREAD (DBID=148366931)   Connected to server version 10.2.0   Control Files in database: /database/oradata/skyread/control01.ctl /database/oradata/skyread/control02.ctl /database/oradata/skyread/control03.ctl   Change database ID of database SKYREAD? (Y/[N]) => y   Proceeding with operation Changing database ID from 148366931 to 277140985 Control File /database/oradata/skyread/control01.ctl - modified Control File /database/oradata/skyread/control02.ctl - modified Control File /database/oradata/skyread/control03.ctl - modified Datafile /database/oradata/skyread/system01.dbf - dbid changed Datafile /database/oradata/skyread/tbs_test.dbf - dbid changed Datafile /database/oradata/skyread/sysaux01.dbf - dbid changed Datafile /database/oradata/skyread/users01.dbf - dbid changed Datafile /database/oradata/skyread/system02.dbf - dbid changed Datafile /database2/oradata/skyread/undotbs02.dbf - dbid changed Datafile /database2/oradata/skyread/TBS_MRPMUSIC01.dbf - dbid changed Datafile /database/oradata/skyread/sf01.dbf - dbid changed Control File /database/oradata/skyread/control01.ctl - dbid changed Control File /database/oradata/skyread/control02.ctl - dbid changed Control File /database/oradata/skyread/control03.ctl - dbid changed Instance shut down   Database ID for database SKYREAD changed to 277140985. All previous backups and archived redo logs for this database are unusable. Database is not aware of previous backups and archived logs in Recovery Area. Database has been shutdown, open database with RESETLOGS option. Succesfully changed database ID. DBNEWID - Completed succesfully. SQL> startup; ORACLE instance started.   Total System Global Area 5049942016 bytes Fixed Size 2090880 bytes Variable Size 1375733888 bytes Database Buffers 3657433088 bytes Redo Buffers 14684160 bytes Database mounted. ORA-01589: must use RESETLOGS or NORESETLOGS option for database open SQL> alter database open resetlogs; Database altered. SQL> select dbid from v$database; DBID ---------- 277140985 这里只是修改了dbid，其他的不再举例，有兴趣可以自己试验