Performing a full database disaster recovery with RMAN
1. Make the RMAN backup set pieces available.
2. Restore the database spfile from autobackups. --先恢复参数文件
3. Restore the control file from autobackups.--再恢复控制文件
4. Run the RMAN restore and recover command. --mount状态下restore和recover数据文件
5. Open the database with the alter database open resetlogs command. --以resetlogs方式打开数据库