Incremental backup? db full

backup as compressed backupset INCREMENTAL from scn 3544827 database format '+SSDDG1' tag 'incre';

set pagesize 1000 linesize 200  
col command_id for a20  
col start_time for a20  
col time_taken_display for a10  
col status for a25  
col input_type for a13  
col output_device_type for a10  
col input_bytes_display for a10  
col output_bytes_display for a10
COL in_sec FORMAT a10
COL out_sec FORMAT a10  
alter session set nls_date_format = 'YYYY-MM-DD HH24:MI:SS';  
select * from  
(select    
  SESSION_KEY
  ,start_time  
  , end_time  
  , time_taken_display  
  , status  
  , input_type  
  , output_device_type 
  ,INPUT_BYTES_PER_SEC_DISPLAY in_sec
  ,OUTPUT_BYTES_PER_SEC_DISPLAY out_sec
  , input_bytes_display 
  , output_bytes_display 
from v$rman_backup_job_details 
order by start_time DESC) 
where rownum<30
/

Incremental backup restore