DBNEWID is a database utility to change the DBNAME and DBID of an Oracle Database. You could change either the DBID or DBNAME or both.
DBNAME is the database name that you specify while creating the database and DBID is a unique number that is assigned to the database when it is created.
The following steps demonstrates how to change the DBNAME and DBID of an Oracle Database using the DBNEWID utility.
IMPORTANT: Before you start the procedure make sure you have a full backup of your database.
Step 0: Before you start, find out the current DBNAME and DBID of your database:
SQL> SELECT DBID,NAME from V$DATABASE;
DBID NAME
---------- ---------
2426088413 MYORDB
Step 1: The first step is to start an instance and mount a database without opening it.
sqlplus / as sysdba SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 1071333376 bytes Fixed Size 1375792 bytes Variable Size 553648592 bytes Database Buffers 511705088 bytes Redo Buffers 4603904 bytes Database mounted. SQL> exit Disconnected from Oracle Database 11g Release 11.2.0.1.0 - Production
Step 2. Run the DBNEWID utility by specifying the connection string and a new name for the database. The user specified in the connection string should have SYSDBA privilege.
nid target=sys/MYPASS@MYORDB dbname=MYNEWDB setname=YES DBNEWID: Release 11.2.0.1.0 - Production on Tue May 30 12:50:01 2015 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. Connected to database MYORDB (DBID=2436089413) Connected to server version 11.2.0 Control Files in database: C:ORADATAMYORDBCONTROL01.CTL C:ORADATAMYORDBCONTROL02.CTL Change database name of database MYORDB to MYNEWDB? (Y/[N]) => Y Proceeding with operation Changing database name from MYORDB to MYNEWDB Control File C:ORADATAMYORDBCONTROL01.CTL - modified Datafile C:ORADATAMYORDBSYSTEM01.DB - wrote new name Datafile C:ORADATAMYORDBSYSAUX01.DB - wrote new name Datafile C:ORADATAMYORDBUNDOTBS01.DB - wrote new name Datafile C:ORADATAMYORDBUSERS01.DB - wrote new name Datafile C:ORADATAMYORDBMYORDBDAT01.DB - wrote new name Datafile C:ORADATAMYORDBMYORDBIDX01.DB - wrote new name Datafile C:ORADATAMYORDBTEMP01.DB - wrote new name Control File C:ORADATAMYORDBCONTROL01.CTL - wrote new name Control File C:ORADATAMYORDBCONTROL02.CTL - wrote new name Instance shut down Database name changed to MYNEWDB. Modify parameter file and generate a new password file before restarting. Succesfully changed database name. DBNEWID - Completed succesfully.
Step 3: Shut down the database.
SQL> shutdown immediate
Step 4: Set the DB_NAME initialization parameter in the initialization parameter file to the new database name.
sqlplus / as sysdba
SQL> show parameter db_name
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_name string MYORDB
SQL> alter system set db_name=MYNEWDB scope=spfile;
System altered.
Step 5: Create a new password file.
orapwd file=orapwMYNEWDB password=MYPASS
Step 6: Start up the database
SQL> startup mount
Step 7: Verify name change
SQL> SELECT DBID,NAME from V$DATABASE;
DBID NAME
---------- ---------
2426088413 MYNEWDB
