When I connected to my database, I got message the database is shutdown.
When I shutdown my database and try to restart my database again, I got the following errors:
ORA-01113: file 5 needs media recovery
ORA-01110: data file 5: C:\DB11\ORADATA\DB11\Example01.dbf
Many thanks, Helen
thanks for reply. when I tried "recover database" I got the following errors
ORA-00283: recovery session canceled due to errors
ORA-00322: log 1 of thread 1 is not current copy
ORA-00312: online log 1 thread 1: 'C:\DB1\ORADATA\DB1\REDO01.LOG'
This datafile normaly is for Example schemas only, if you don't need these data's you can "offline drop" this datafile and bring your database up (if other datafiles didn't demage)
SQL> alter database datafile ''C:\DB11\ORADATA\DB11\Example01.dbf'' offline drop;
SQL> Alter database open;
P.S: I'm agree with Aron but sometimes bring database up is more important!
Data from Example users like HR and any other example schemas if created in installation.
If you create any user and assgn other tablespace (like users) you will not lose that data's.
For more safely, shudown database and copy all you datafiles, controll file and redo log files other places (Cold Backup)