Find Checkpoint of datafiles in Oracle

set feed off
set pagesize 10000
set linesize 500
break on grantee skip 1
column datum new_value datum noprint
column file_nr format 999999 heading 'File#'
column checkpoint_time format A20 heading 'Checkpoint|Time'
column file_name format A59 heading 'Filename'
select FILE# file_nr,
to_char(CHECKPOINT_TIME,'DD.MM.YYYY:HH24:MI:SS') checkpoint_time,
name file_name
from v$datafile_header;