ORA-01103: database name ‘DB01’ in control file is not ‘DBDG’

Cause

The database name in the control file does not match your database name.

Action

Either find the correct control file or change your database name.

This will be the error message

SQL>STARTUP
 
ORACLE instance started.
 
Total System Global Area  612368384 bytes
Fixed Size                  1292036 bytes
Variable Size             239077628 bytes
Database Buffers          364904448 bytes
Redo Buffers                7094272 bytes
ORA-01103: database name 'DB01' in control file is not 'DBDG'

 

Fix it :

1- Stop the database

SQL>shutdown immediate; 
ORA-01507: database not mounted
ORACLE instance shut down.

2- Start you database in nomount mode and alter the DB_NAME parameter.

 

SQL>STARTUP NOMOUNT;
ORACLE instance started.
Total System Global Area  612368384 bytes
Fixed Size                  1292036 bytes
Variable Size             243271932 bytes
Database Buffers          360710144 bytes
Redo Buffers                7094272 bytes
 
SQL> ALTER SYSTEM SET DB_NAME=DB01 SCOPE=SPFILE;
System altered.

3- Start up your database

SQL> SHUT IMMEDIATE;
ORA-01507: database not mounted
ORACLE instance shut down.
 
SQL>STARTUP
ORACLE instance started.
Total System Global Area  612368384 bytes
Fixed Size                  1292036 bytes
Variable Size             247466236 bytes
Database Buffers          356515840 bytes
Redo Buffers                7094272 bytes
Database mounted.
Database opened.