Drop a tablespace and datafile when database is mounted

Question

I tried to import data in my oracle 11g. It failed midway. I presumed that i did not size the redolog properly. Now my database cannot go beyound the mounted mode.
ORA-01157: cannot identify/lock data file 7 – see DBWR trace file
ORA-01110: data file 7: ‘ /data1/owprojects/xxxxx.dbf ‘
Its a new oracle installation and i do not need the corrupt datafile.
I cant take the tablespace offline neither can i drop the tablespace including its contents.
Do i drop from the Linux OS. If yes which other file to i edit to remove the pointer to this tablespace.
Thanks and Best Regards
J

Answer 1

Try:
alter database datafile 7 offline for drop;Example:
SQL> startup mount;
ORACLE instance started.
Total System Global Area 1071333376 bytes
Fixed Size                  1388352 bytes
Variable Size             658505920 bytes
Database Buffers          406847488 bytes
Redo Buffers                4591616 bytes
Database mounted.
SQL>
SQL> alter database open;
alter database open
ERROR at line 1:
ORA-01157: cannot identify/lock data file 5 - see DBWR trace file
ORA-01110: data file 5: 'C:\TEMP\TEST01.DBF'
SQL> alter database datafile 5 offline for drop;
Database altered.
SQL> alter database open;
Database altered.
SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     396
Next log sequence to archive   397
Current log sequence           397
SQL> alter tablespace test drop datafile 5;
alter tablespace test drop datafile 5
ERROR at line 1:
ORA-03261: the tablespace TEST has only one file
SQL> drop tablespace test;
Tablespace dropped.
SQL>Please read http://docs.oracle.com/cd/E11882_01/server.112/e25494/dfiles004.htm#ADMIN11428.
Edited by: P. Forstmann on 19 mars 2012 18:53