ORA-01122, ORA-01110 and ORA-01251

Question

When we are opening the database following errors are coming in sequence as follows:
ORA-01122, ORA-01110 and ORA-01251
Other facts:
We don’t have any backup.
Database is not in archive mode.
Personally I don't see any hope.
What you guys think?

Answer 1

Ok see this
SQL> startup
ORACLE instance started.
I tried do media recover in case of NOARCHIVE log mode. You can try the same in you case too
(1) Starting the Database
Total System Global Area 118255568 bytes
Fixed Size 282576 bytes
Variable Size 83886080 bytes
Database Buffers 33554432 bytes
Redo Buffers 532480 bytes
Database mounted.
ORA-01113: file 8 needs media recovery
ORA-01110: data file 8: 'C:\ORADATA\MANU\USERS01.DBF'
(2) Check the database mode
SQL> select log_mode from v$database;
LOG_MODE
NOARCHIVELOG
(3) Switch on the archive logmode
SQL> alter database archivelog;
Database altered.
(4) Recover the Database
SQL> recover
Media recovery complete.
(5) Shutdown the Database
SQL> shutdown
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
(6) Start the Database again
SQL> startup
ORACLE instance started.
Total System Global Area 118255568 bytes
Fixed Size 282576 bytes
Variable Size 83886080 bytes
Database Buffers 33554432 bytes
Redo Buffers 532480 bytes
Database mounted.
Database opened.
SQL>