Is it possible to recover a Database in the following condition??

Question

Dear folks:
this question has confused me quite a while, and nobody I asked can answer it. Please kindly provide any hint to the following question:
Suppose I did a hot backup last night.
(use ALTER TABLESPACE BEGIN BACKUP;copy Datafiles;ALTER TABLESPACE END BACKUP;repeat and finish all those Tablespaces;ALTER DATABASE BACKUP CONTROLFILE TO 'abc';)
Today, my hard drive crash and everything is gone!!
Now, the only thing I have are the Datafiles and Control file backed up last night (use the method above).
Is it possible, if Yes, how,to recover the DB in this condition??
Thank you very very much for your reply...
Wayne

Answer 1

Wayne here you have the procedure to recreate the controlfile.
CREATE CONTROLFILE
Caution:
Oracle recommends that you perform a full backup of all files in the database before using this statement. For more information, see Oracle9i User-Managed Backup and Recovery Guide.
Purpose
Use the CREATE CONTROLFILE statement to re-create a control file in one of the following cases:
All copies of your existing control files have been lost through media failure.
You want to change the name of the database.
You want to change the maximum number of redo log file groups, redo log file members, archived redo log files, datafiles, or instances that can concurrently have the database mounted and open.
Note:
If it is necessary to use the CREATE CONTROLFILE statement, do not include in the DATAFILE clause any datafiles in temporary or read-only tablespaces. You can add these types of files to the database later.
An alternative to the CREATE CONTROLFILE statement is ALTER DATABASE BACKUP CONTROLFILE TO TRACE, which generates a SQL script in the trace file to re-create the controlfile. If your database contains any read-only or temporary tablespaces, that SQL script will also contain all the necessary SQL statements to add those files back into the database
Creating a Controlfile: Example
This statement re-creates a control file. In this statement, database demo was created with the WE8DEC character set. The example uses the word path where you would normally insert the path on your system to the appropriate Oracle directories.
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "demo" NORESETLOGS NOARCHIVELOG
MAXLOGFILES 32
MAXLOGMEMBERS 2
MAXDATAFILES 32
MAXINSTANCES 1
MAXLOGHISTORY 449
LOGFILE
GROUP 1 '/path/oracle/dbs/t_log1.f' SIZE 500K,
GROUP 2 '/path/oracle/dbs/t_log2.f' SIZE 500K
# STANDBY LOGFILE
DATAFILE
'/path/oracle/dbs/t_db1.f',
'/path/oracle/dbs/dbu19i.dbf',
'/path/oracle/dbs/tbs_11.f',
'/path/oracle/dbs/smundo.dbf',
'/path/oracle/dbs/demo.dbf'
CHARACTER SET WE8DEC
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_54a.htm#SQLRF01203
Joel Pérez