Cannot open database Control file error

Question

I am new to Oracle db and while trying to multiplex the control files something went wrong. Now i am not able to open the db and it is in mount state.
when i try to startup force the database i get the following errors:
SQL> startup force
ORACLE instance started.
Total System Global Area 599785472 bytes
Fixed Size 1250356 bytes
Variable Size 260049868 bytes
Database Buffers 331350016 bytes
Redo Buffers 7135232 bytes
Database mounted.
ORA-01122: database file 1 failed verification check
ORA-01110: data file 1: 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\SREE\SYSTEM01
ORA-01207: file is more recent than control file - old control file
The database is in noarchivelog mode and i dont have any backup of it :(.
As the data is not critical i dont want to recove the data, i just want to bring my Database to Open state! Is it possible??
Thanks
Sree

Answer 1

hi
you can create new controlfile
Creating a Controlfile: Example
This statement re-creates a control file. In this statement, database demo was created with the WE8MSWIN1252 character set. The example uses the word path where you would normally insert the path on your system to the appropriate Oracle Database directories.
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ORABASE" NORESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 'C:\APP\ORACLE\ORADATA\ORABASE\REDO01.LOG' SIZE 50M,
GROUP 2 'C:\APP\ORACLE\ORADATA\ORABASE\REDO02.LOG' SIZE 50M,
GROUP 3 'C:\APP\ORACLE\ORADATA\ORABASE\REDO03.LOG' SIZE 50M
-- STANDBY LOGFILE
DATAFILE
'C:\APP\ORACLE\ORADATA\ORABASE\SYSTEM01.DBF',
'C:\APP\ORACLE\ORADATA\ORABASE\SYSAUX01.DBF',
'C:\APP\ORACLE\ORADATA\ORABASE\UNDOTBS01.DBF',
'C:\APP\ORACLE\ORADATA\ORABASE\USERS01.DBF',
'C:\APP\ORACLE\ORADATA\ORABASE\EXAMPLE01.DBF',
'C:\APP\ORACLE\ORADATA\ORABASE\UWDATA01.DBF'
CHARACTER SET WE8MSWIN1252;
-- Commands to re-create incarnation table
-- Below log names MUST be changed to existing filenames on
-- disk. Any one log file from each branch can be used to
-- re-create incarnation records.
-- ALTER DATABASE REGISTER LOGFILE 'C:\APP\ORACLE\FLASH_RECOVERY_AREA\ORABASE\ARCHIVELOG\2009_02_02\O1_MF_1_1_%U_.ARC';
-- ALTER DATABASE REGISTER LOGFILE 'C:\APP\ORACLE\FLASH_RECOVERY_AREA\ORABASE\ARCHIVELOG\2009_02_02\O1_MF_1_1_%U_.ARC';
-- Recovery is required if any of the datafiles are restored backups,
-- or if the last shutdown was not normal or immediate.
RECOVER DATABASE
-- Database can now be opened normally.
ALTER DATABASE OPEN;
-- Commands to add tempfiles to temporary tablespaces.
-- Online tempfiles have complete space information.
-- Other tempfiles may require adjustment.
ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APP\ORACLE\ORADATA\ORABASE\TEMP01.DBF'
SIZE 20971520 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M;
-- End of tempfile additions.
-- Set #2. RESETLOGS case
-- The following commands will create a new control file and use it
-- to open the database.
-- Data used by Recovery Manager will be lost.
-- The contents of online logs will be lost and all backups will
-- be invalidated. Use this only if online logs are damaged.
-- After mounting the created controlfile, the following SQL
-- statement will place the database in the appropriate
-- protection mode:
-- ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE
http://psoug.org/reference/control_file.html
http://www.comp.dit.ie/btierney/oracle11gdoc/server.111/b28286/statements_5003.htm
hope this helps
zekeriya