oracle,ddl,tablespace , How can I delete the users datafile in Oracle using SQL?


How can I delete the users datafile in Oracle using SQL?

Question:

Tag: oracle,ddl,tablespace

I have tried dropping the datafile by itself but I get this error.

SQL> alter tablespace USERS drop datafile '/u01/app/oracle/oradata/orcl/users01.dbf';
alter tablespace USERS drop datafile '/u01/app/oracle/oradata/orcl/users01.dbf'
*
ERROR at line 1:
ORA-03261: the tablespace USERS has only one file

I have also tried taking the tablespace offline and dropping the whole tablespace but that doesn't work either.

SQL> drop tablespace users including contents and datafiles;
drop tablespace users including contents and datafiles
*
ERROR at line 1:
ORA-12919: Can not drop the default permanent tablespace

Edit: This is for an assignment to simulate the failure of a datafile that I will be recovering. I would delete it manually but the assignment is requiring me to use SQL.


Answer:

If you only want to drop the datafile to simulate a hardware failure, than you can simply delete them from the machine.

You can know where are stored your datafile using a simple query :

select name
from V$DATAFILE;

This will give the path to all data files.

Edit : To simulate an even more cool system failure to make sure your backup scripts or whatever you are testing is properly working, you could also corrupt the data (open a file and write some random gibberish in it)


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