How to Trunc one number and Round another number in different row?

Question

Here is a sample where I take a percent of a number.
<code>
SELECT 40*.5 AONE, 'A' aname
FROM DUAL
UNION ALL
SELECT 121*.5 AONE, 'B' aname
FROM DUAL
UNION ALL
SELECT 121*.5 AONE, 'C' aname
FROM DUAL
UNION ALL
SELECT 80*.5 AONE, 'D' aname
FROM DUAL
</code>
this gives me
20 A
60.5 B
60.5 C
40 D
I want to TRUNC one number and ROUND another number where the number has a
"0.5" so I would have
20 A
61 B
60 C
40 D
I will have more than 4 records, just trying to keep it simple.
Suggestions?
TIA
Steve42
Edited by: Steve42 on Dec 5, 2011 1:44 PM

Answer 1

I missed you only want to truncate/round where value fractional part is .5:
WITH SAMPLE_TABLE AS (
                      SELECT 40*.5 AONE, 'A' aname FROM DUAL UNION ALL
                      SELECT 121*.5 AONE, 'B' aname FROM DUAL UNION ALL
                      SELECT 121*.5 AONE, 'C' aname FROM DUAL UNION ALL
                      SELECT 80*.5 AONE, 'D' aname FROM DUAL
SELECT  CASE MOD(ABS(AONE),1)
          WHEN .5 THEN
                    CASE MOD(ROW_NUMBER() OVER(ORDER BY CASE MOD(ABS(AONE),1) WHEN .5 THEN ANAME END NULLS LAST),2)
                      WHEN 1 THEN TRUNC(AONE)
                      WHEN 0 THEN ROUND(AONE)
                    END
          ELSE AONE
        END AONE,
        ANAME
  FROM  SAMPLE_TABLE
  ORDER BY ANAME,
           ROW_NUMBER() OVER(ORDER BY CASE MOD(ABS(AONE),1) WHEN .5 THEN ANAME END NULLS LAST)
      AONE A
        20 A
        60 B
        61 C
        40 D
SQL> SY.
Edited by: Solomon Yakobson on Dec 5, 2011 5:05 PM