How to recover database without controlfile and redo files?

Question

Hi all,
If I just have datafiles using hot backup saving in another machine, and all files in current database were lost including data files,control files and redo log files .
How can I recover database just using hot backup datafiles? without control file, without redo files.
Your help is greatly appreciated.

Answer 1

alter database backup control file to trace
SQL> alter database backup controlfile to trace;
Go to udump folder in oracle home folder check the trace file copy these lines
CREATE CONTROLFILE REUSE DATABASE "O10G1” NORESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 454
LOGFILE
GROUP 1 'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\REDO01.LOG' SIZE 10M,
GROUP 2 'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\REDO02.LOG' SIZE 10M,
GROUP 3 'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\REDO03.LOG' SIZE 10M
-- STANDBY LOGFILE
DATAFILE
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\SYSTEM01.DBF',
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\UNDOTBS01.DBF',
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\SYSAUX01.DBF',
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\USERS01.DBF'
CHARACTER SET WE8MSWIN1252
Change the new database name “abc
” and REUSE replaced by SET and NORESTLOGS replaced by RESTLOGS above lines.
Save as C1.sql
C:\ set oracle_sid=instance name
C:\>sqlplus /nolog
SQL*Plus: Release 10.1.0.2.0 - Production on Tue Apr
11 06:44:28 2006
Copyright (c) 1982, 2004, Oracle. All rights reserved.
SQL> connect / as sysdba;
Connected to an idle instance.
SQL> startup nomount
pfile='C:\oracle\product\10.1.0\admin\jeeno\pfile\jeenoinit.ora'
ORACLE instance started.
Total System Global Area 171966464 bytes
Fixed Size 787988 bytes
Variable Size 145750508 bytes
Database Buffers 25165824 bytes
Redo Buffers 262144 bytes
SQL> @c1.sql
Control file created.
SQL> alter database open resetlogs;
Database altered