I too agree with Johnson and stecal. assuming your coldbackup includes the controlfiles, redolog files and datafiles, You can just restore them and startup your database. I guess even you apply recover database kind of commands, you will get something similar to "Media Recovery Not Required". kind of messages.
Originally posted by Xung
Thanks for your answers.
whole production is gone. I mean redo log files, datafiles, controlfiles are gone... There are only archivelog files and last cold backup. Can I recover to point in time?