Minus query returning row

Question

Hi
One of my sql minus query is returning row even though both the statements are having same value.
My query is following :
SELECT UNIQUE EMP_AGG_DW_PAYROLL_TOT_FTE_CNT,EMP_AGG_PAY_DEM_EMP_SKEY
FROM DW.AGG_EMP_ACCT_COMPENSATIONS
WHERE EMP_AGG_DW_EFF_START_DT='1-jan-2006'
AND EMP_AGG_PAY_DEM_EMP_SKEY IN (133607,141955)
MINUS
select * from (
SELECT SUM(CS),PAY_DEM_EMP_SKEY FROM (
SELECT SUM(CP)/24 CS,PAY_DEM_EMP_SKEY FROM (
SELECT COUNT(PAY_DEM_DW_PAYROLL_FTE_COUNT) CP,PAY_DEM_EMP_SKEY FROM
DW.PAYROLL_DEMOGRAPHICS A,MRADMIN_PROFPROCDT MP
WHERE PAY_DEM_DW_PAYROLL_FTE_COUNT=1
AND PAY_DEM_DW_PAYROLL_ADJUST_IND = 0
AND PAY_DEM_EMP_SKEY IN (133607,141955)
AND (TRUNC(A.PAY_DEM_PAY_DT) BETWEEN TRUNC(MP.D_BEGIN_DATE)
AND TRUNC(MP.D_END_DATE))
GROUP BY PAY_DEM_EMP_SKEY)GROUP BY PAY_DEM_EMP_SKEY
UNION ALL
SELECT SUM(CP)/48 CS,PAY_DEM_EMP_SKEY FROM (
SELECT COUNT(PAY_DEM_DW_PAYROLL_FTE_COUNT) CP,PAY_DEM_EMP_SKEY FROM DW.PAYROLL_DEMOGRAPHICS
WHERE PAY_DEM_DW_PAYROLL_FTE_COUNT=.5
AND PAY_DEM_DW_PAYROLL_ADJUST_IND = 0
AND PAY_DEM_EMP_SKEY IN (133607,141955)
GROUP BY PAY_DEM_EMP_SKEY)GROUP BY PAY_DEM_EMP_SKEY )
GROUP BY PAY_DEM_EMP_SKEY
This is returning two rows.
When I run queries seperatly then i am getting following result :
EMP_AGG_DW_PAYROLL_TOT_FTE_CNT     EMP_AGG_PAY_DEM_EMP_SKEY
0.0416666666666667                133607
0.0416666666666667                    141955
SUM(CS)          PAY_DEM_EMP_SKEY
0.0416666666666667 133607
0.0416666666666667     141955
I am unable to get the exact reason behind me.
Any help is higly appreciated.

Answer 1

Probably some differences that are not shown due to rounding as in example below?
SQL> set numw 5
SQL> select 1.666666666666 from dual;
1.666666666666
         1,667
Elapsed: 00:00:00.00
SQL> select 1.666666 from dual;
1.666666
   1,667
Elapsed: 00:00:00.00
SQL> select 1.666666666666 from dual
  2  minus
  3  select 1.666666 from dual;
1.666666666666
         1,667
Elapsed: 00:00:00.00
SQL> Gints Plivna
http://www.gplivna.eu