RMAN usefull comands ....

Full Database Restore
$ORACLE_HOME/bin/rman target / nocatalog
RMAN> shutdown abort;
RMAN> startup mount;
RMAN> restore database;
RMAN> recover database;
RMAN> alter database open;
database opened
Tablespace Restore (online)
$ORACLE_HOME/bin/rman target / nocatalog
RMAN> sql ‘alter tablespace users offline’;
RMAN> restore tablespace users;
RMAN> recover tablespace users;
RMAN> sql ‘alter tablespace users online’;
* A SYSTEM tablespace cannot be recovered with the database online.
Tablespace Restore (offline)
$ORACLE_HOME/bin/rman target / nocatalog
RMAN> shutdown abort;
RMAN> startup mount;
RMAN> restore tablespace users;
RMAN> recover tablespace users;
RMAN> alter database open;
database opened
Restoring a Specific Datafile
$ORACLE_HOME/bin/rman target / nocatalog
RMAN> shutdown abort;
RMAN> startup mount;
RMAN> restore datafile ‘/oradata/DB1/dbf/users01.dbf’;
RMAN> recover datafile ‘/oradata/DB1/dbf/users01.dbf’;
RMAN> alter database open;
database opened
Control File Restoration
Prerequisite: In your rman backup directory determine the latest control file backup.
Default Format: c-nnnnnnnnnn-nnnnnnnn-nn
$ORACLE_HOME/bin/rman target / nocatalog
RMAN> shutdown abort;
RMAN> startup nomount;
RMAN> set dbid = 1184749195
RMAN> restore controlfile from ‘/oradata/DB1/rman/c-1184749195-20060626-02’
RMAN> alter database mount;
RMAN> restore database;
RMAN> recover database;
RMAN> alter database open resetlogs;
database opened
Database Point-In-Time-Recovery (PITR)
Also known as time-based incomplete recovery.
$ORACLE_HOME/bin/rman target / nocatalog
RMAN> shutdown abort;
RMAN> startup mount;
RMAN> restore database until time “to_date(’09/03/07 13:00:00′, ‘MM/DD/YY HH24:MI:SS’)”;
RMAN> recover database until time “to_date(’09/03/07 13:00:00′, ‘MM/DD/YY HH24:MI:SS’)”;
RMAN> alter database open resetlogs;
database opened
* Make sure you perform a full backup after this operation!
Restore to Another System
Prerequisites
Ideally ensure destination system configured exactly like source.
Same OS version and patch level.
Same drives (C:, D:, S: etc.).
CPU and RAM same or better.
The same version of Oracle is installed on the target system as the source.
Ensure the ORACLE_HOME and ORACLE_SID environment variables are set.
Ensure the listener is running.
Copy RMAN backupset files to the destination system rman directory.
If Windows:
Create the password file.
orapwd file=orapwDB1 password=mypassword
Creates the file %ORACLE_HOME%\dbs\orapwDB1
Copy %ORACLE_HOME%\dbs\orapwDB1 to %ORACLE_HOME%\database.
In some instances of a restore like this it may look for the file here.
Create or start the Windows database instance service.
oradim -new -sid DB1 -intpwd mypassword -startmode MANUAL
Creates the file: %ORACLE_HOME%\database\PWDDB1.ORA
Ensure the drive\path to the admin (adump,bdump,cdump,udump), data and redo directories on the source and destination systems are identical.
Example:
Admin Dump Directories
mkdir C:\oracle\product\10.2.0\admin
mkdir C:\oracle\product\10.2.0\admin\DB1
mkdir C:\oracle\product\10.2.0\admin\DB1\adump
mkdir C:\oracle\product\10.2.0\admin\DB1\bdump
mkdir C:\oracle\product\10.2.0\admin\DB1\cdump
mkdir C:\oracle\product\10.2.0\admin\DB1\udump
Data Directories
mkdir D:\oradata
mkdir D:\oradata\DB1
Redo and Archive Log Directories
mkdir D:\oradata\DB1\recovery1
mkdir D:\oradata\DB1\recovery2
Procedure
Restore SPFILE and Control File
%ORACLE_HOME%\bin\rman target / nocatalog
RMAN> set dbid 161080442
RMAN> startup nomount;
Creates the file: %ORACLE_HOME%\database\hc_db1.dat
RMAN> restore spfile from ‘R:\rman\C-161080442-20080313-00’;
Creates the file: %ORACLE_HOME%\database\SPFILEDB1.ORA
RMAN> startup force nomount
RMAN> restore controlfile from ‘R:\rman\C-161080442-20080313-00’;
RMAN> shutdown immediate
RMAN> exit
Restore and Recover the Data
%ORACLE_HOME%\bin\rman target / nocatalog
RMAN> startup mount;
RMAN> restore database;
For a large database this step may take some time.
RMAN> recover database;
If you do not have\need the very last log(s) you can disregard any error messages.
ORA-00310: archived log contains sequence 100; sequence 101 required…
RMAN> alter database open resetlogs;
database opened

Thanks
Srini