------------------------------ Commands Entered ------------------------------
WITH
 testb(mo , num) AS (
VALUES
  (1 ,  8)
, (2 , 40)
, (3 , 16)
, (4 , 25)
, (5 , 36)
, (6 ,  2)
)
SELECT MIN(num) AS "min(num)"
     , MAX(num) AS "max(num)"
     , SUM(num) AS "sum(num)"
     , MAX(CASE num WHEN min_num THEN mo END) AS "mo of min(num):1"
     , MAX(CASE num WHEN max_num THEN mo END) AS "mo of max(num):1"
     , MAX(CASE rn_as WHEN 1 THEN mo END) AS "mo of min(num):2"
     , MAX(CASE rn_de WHEN 1 THEN mo END) AS "mo of max(num):2"
  FROM (SELECT mo , num
             , MIN(num) OVER() AS min_num
             , MAX(num) OVER() AS max_num
             , ROW_NUMBER() OVER(ORDER BY num ASC ) AS rn_as
             , ROW_NUMBER() OVER(ORDER BY num DESC) AS rn_de
          FROM testb
       ) s
;
------------------------------------------------------------------------------

min(num)    max(num)    sum(num)    mo of min(num):1 mo of max(num):1 mo of min(num):2 mo of max(num):2
----------- ----------- ----------- ---------------- ---------------- ---------------- ----------------
          2          40         127                6                2                6                2

  1 record(s) selected.

WITH
 testb(mo , num) AS (
VALUES
  (1 ,  8)
, (2 , 40)
, (3 , 16)
, (4 , 25)
, (5 , 36)
, (6 ,  2)
)
, query_result AS (
SELECT MIN(num) AS "min(num)"
     , MAX(num) AS "max(num)"
     , SUM(num) AS "sum(num)"
     , MAX(CASE num WHEN min_num THEN mo END) AS "mo of min(num)"
     , MAX(CASE num WHEN max_num THEN mo END) AS "mo of max(num)"
  FROM (SELECT mo , num
             , MIN(num) OVER() AS min_num
             , MAX(num) OVER() AS max_num
          FROM testb
       ) s
)
SELECT 
       CASE k
       WHEN 1 THEN
            'min(num) = ' || VARCHAR("min(num)")
       WHEN 2 THEN
            'max(num) = ' || VARCHAR("max(num)")
       WHEN 3 THEN
            'sum(num) = ' || VARCHAR("sum(num)")
       WHEN 4 THEN
            'mo of the min(num) = ' || VARCHAR("mo of min(num)")
       WHEN 5 THEN
            'mo of the max(num) = ' || VARCHAR("mo of max(num)")
       END
         AS "<expression> = <value>"
 FROM  query_result
 CROSS JOIN
       (VALUES 1,2,3,4,5) k(k)
 ORDER BY
       k
;
------------------------------------------------------------------------------

<expression> = <value>          
--------------------------------
min(num) = 2                    
max(num) = 40                   
sum(num) = 127                  
mo of the min(num) = 6          
mo of the max(num) = 2          

  5 record(s) selected.

WITH
 testb(mo , num) AS (
VALUES
  (1 ,  8)
, (2 , 40)
, (3 , 16)
, (4 , 25)
, (5 , 36)
, (6 ,  2)
)
SELECT MIN(num) AS "min(num)"
     , MAX(num) AS "max(num)"
     , SUM(num) AS "sum(num)"
     , MAX(CASE num WHEN min_num THEN mo END) AS "mo of min(num)"
     , MAX(CASE num WHEN max_num THEN mo END) AS "mo of max(num)"
  FROM testb
     , (SELECT MIN(num) AS min_num
             , MAX(num) AS max_num
          FROM testb
       ) s
;
------------------------------------------------------------------------------

min(num)    max(num)    sum(num)    mo of min(num) mo of max(num)
----------- ----------- ----------- -------------- --------------
          2          40         127              6              2

  1 record(s) selected.

with TESTB (MO, NUM) as
(select 1,  8
from sysibm.sysdummy1 union all
select 2, 40
from sysibm.sysdummy1 union all
select 3, 16
from sysibm.sysdummy1 union all
select 4, 25
from sysibm.sysdummy1 union all
select 5, 36
from sysibm.sysdummy1 union all
select 6,  2
from sysibm.sysdummy1 ) 
select 
min(num) min_num, 
max(num) max_num,
sum(num) sum_num,
INT(SUBSTR(min( digits(num) CONCAT CHAR(mo)),11)) min_mo, 
INT(SUBSTR(max( digits(num) CONCAT CHAR(mo)),11)) max_mo 
from TESTB