Cannot open db

[akhadar]

U need to perform a media recovery.
Issue the following statements from SQL.
1.Shutdown immediate.
2.Startup mount
3.SELECT member FROM v$log l, v$logfile f WHERE l.group# = f.group# AND l.status = 'CURRENT';
4.Recover database until cancel;
5.Apply the log member from step 3.
6.Alter database open resetlogs;
Once ur database is succssefully open then take immediate system backup.