下面修改数据库的SID和db_name

1. [root@oracle ~]# su - ora11g
2. db11@oracle /home/ora11g$
3. db11@oracle  /home/ora11g$ sqlplus /as sysdba
5. SQL*Plus:Release11.2.0.4.0Production on MonMar3007:39:362015
7. Copyright(c)1982,2013,Oracle.All rights reserved.
10. Connected to:
11. OracleDatabase11gEnterpriseEditionRelease11.2.0.4.0-64bitProduction
12. With the Partitioning, OLAP,DataMiningandRealApplicationTesting options
14. SQL>select name, dbid,log_mode,open_mode from v$database;
16. NAME DBID LOG_MODE OPEN_MODE
17. ---------------------------------------------------
18. DB11 1400765095 ARCHIVELOG READ WRITE

启动到mount状态

1. SQL> shutdown immediate;
2. Database closed.
3. Database dismounted.
4. ORACLE instance shut down.
5. SQL> startup mount
6. ORACLE instance started.
8. TotalSystemGlobalArea835104768 bytes
9. FixedSize2257840 bytes
10. VariableSize507513936 bytes
11. DatabaseBuffers322961408 bytes
12. RedoBuffers2371584 bytes
13. Database mounted.
14. SQL>exit
15. DisconnectedfromOracleDatabase11gEnterpriseEditionRelease11.2.0.4.0-64bitProduction
16. With the Partitioning, OLAP,DataMiningandRealApplicationTesting options

执行命令

1. db11@oracle /home/ora11g$ nid target=sys/oracle dbname=newdb11 setname=yes
3. DBNEWID:Release11.2.0.4.0-Production on MonMar3007:44:262015
5. Copyright(c)1982,2011,Oracleand/or its affiliates.All rights reserved.
7. Connected to database DB11 (DBID=1400765095)
9. Connected to server version 11.2.0
11. ControlFilesin database:
12. /u01/app/oracle11g/oradata/DB11/controlfile/o1_mf_bcc2h7dx_.ctl
14. Change database name of database DB11 to NEWDB11?(Y/[N])=> Y
16. Proceedingwith operation
17. Changing database name from DB11 to NEWDB11
18. ControlFile/u01/app/oracle11g/oradata/DB11/controlfile/o1_mf_bcc2h7dx_.ctl - modified
19. Datafile/u01/app/oracle11g/oradata/DB11/datafile/o1_mf_system_bcc2dp1d_.db - wrote new name
20. Datafile/u01/app/oracle11g/oradata/DB11/datafile/o1_mf_sysaux_bcc2dp2c_.db - wrote new name
21. Datafile/u01/app/oracle11g/oradata/DB11/datafile/fdstore.db - wrote new name
22. Datafile/u01/app/oracle11g/oradata/DB11/datafile/o1_mf_users_bcc2dp33_.db - wrote new name
23. Datafile/u01/app/oracle11g/oradata/DB11/datafile/o1_mf_new_user_bcp23qgn_.db - wrote new name
24. Datafile/u01/app/oracle11g/oradata/DB11/datafile/undotbs2.db - wrote new name
25. Datafile/u01/app/oracle11g/oradata/DB11/datafile/o1_mf_temp_bcc2hld2_.tm - wrote new name
26. ControlFile/u01/app/oracle11g/oradata/DB11/controlfile/o1_mf_bcc2h7dx_.ctl - wrote new name
27. Instance shut down
29. Database name changed to NEWDB11.
30. Modify parameter file and generate a new password file before restarting.
31. Succesfully changed database name.
32. DBNEWID -Completed succesfully.

数据库中修改db_name

1. db11@oracle /u01/app/oracle11g/product/11.2.0/dbhome_1/dbs$ sqlplus /as sysdba
3. SQL*Plus:Release11.2.0.4.0Production on MonMar3007:58:332015
5. Copyright(c)1982,2013,Oracle.All rights reserved.
7. Connected to an idle instance.
9. SQL> startup nomount
10. ORACLE instance started.
12. TotalSystemGlobalArea835104768 bytes
13. FixedSize2257840 bytes
14. VariableSize507513936 bytes
15. DatabaseBuffers322961408 bytes
16. RedoBuffers2371584 bytes
17. SQL>set line 200
18. SQL> show parameter db_name
19. SQL> show parameter db_name
21. NAME TYPE VALUE
22. ----------------------------------------------------------------------------------------
23. db_name string db11
24. SQL> alter system set db_name=newdb11 scope=spfile;
26. System altered.
28. SQL> startup mount force
29. ORACLE instance started.
31. TotalSystemGlobalArea835104768 bytes
32. FixedSize2257840 bytes
33. VariableSize507513936 bytes
34. DatabaseBuffers322961408 bytes
35. RedoBuffers2371584 bytes
36. Database mounted.
37. SQL>exit
38. DisconnectedfromOracleDatabase11gEnterpriseEditionRelease11.2.0.4.0-64bitProduction
39. With the Partitioning, OLAP,DataMiningandRealApplicationTesting options

创建新的密码文件

1. db11@oracle /home/ora11g$ 
2. db11@oracle  /home/ora11g$ orapwd file=$ORACLE_HOME/dbs/orapwnewdb11 password=oracle entries=10
3.  
4. 创建参数文件
5.  
6. db11@oracle  /home/ora11g$ export ORACLE_SID=newdb11
8. SQL> create spfile from pfile;
10. File created.
12. SQL>exit
13. DisconnectedfromOracleDatabase11gEnterpriseEditionRelease11.2.0.4.0-64bitProduction
14. With the Partitioning, OLAP,DataMiningandRealApplicationTesting options
16. 根据原参数文件，修改成新的参数文件，具体操作略

启动新的数据库名的数据库

1. newdb11@oracle /home/ora11g$ export ORACLE_SID=newdb11
2. newdb11@oracle  /home/ora11g$ sqlplus /as sysdba
4. SQL*Plus:Release11.2.0.4.0Production on MonMar3008:16:162015
6. Copyright(c)1982,2013,Oracle.All rights reserved.
9. Connected to:
10. OracleDatabase11gEnterpriseEditionRelease11.2.0.4.0-64bitProduction
11. With the Partitioning, OLAP,DataMiningandRealApplicationTesting options
13. SQL> startup
14. ORACLE instance started.
16. TotalSystemGlobalArea835104768 bytes
17. FixedSize2257840 bytes
18. VariableSize507513936 bytes
19. DatabaseBuffers322961408 bytes
20. RedoBuffers2371584 bytes
21. Database mounted.
22. Database opened.
23. SQL>
24. SQL>select instance_name,status from v$instance;
26. INSTANCE_NAME STATUS
27. ----------------------------
28. newdb11 OPEN

OK。。。启动成功