SET LINESIZE 147
SET PAGESIZE 9999
SET VERIFY   OFF

COLUMN tablespace      FORMAT a29                HEADING 'Tablespace Name'
COLUMN filename        FORMAT a64                HEADING 'Filename'
COLUMN filesize        FORMAT 9,999,999,999,999  HEADING 'File Size'
COLUMN autoextensible  FORMAT a4                 HEADING 'Auto'
COLUMN increment_by    FORMAT 999,999,999        HEADING 'Next'
COLUMN maxbytes        FORMAT 99,999,999,999     HEADING 'Max'

BREAK ON report
COMPUTE SUM OF filesize  ON report

SELECT /*+ ordered */
    d.tablespace_name                     tablespace
  , d.file_name                           filename
  , d.bytes                               filesize
  , d.autoextensible                      autoextensible
  , d.increment_by * e.value              increment_by
  , d.maxbytes                            maxbytes
FROM
    sys.dba_data_files d
  , v$datafile v
  , (SELECT value
     FROM v$parameter 
     WHERE name = 'db_block_size') e
WHERE
  (d.file_name = v.name)
UNION
SELECT
    d.tablespace_name                     tablespace 
  , d.file_name                           filename
  , d.bytes                               filesize
  , d.autoextensible                      autoextensible
  , d.increment_by * e.value              increment_by
  , d.maxbytes                            maxbytes
FROM
    sys.dba_temp_files d
  , (SELECT value
     FROM v$parameter 
     WHERE name = 'db_block_size') e
ORDER BY 1,2
/