Question

I have to select query like the following example :

Select name,
       SUM(DECODE(TO_CHAR(Datee,'MM'),'01',PRICE)) JAN_12,
       SUM(DECODE(TO_CHAR(Datee,'MM'),'02',PRICE)) FEB_12
 from price_list_LastYear

 UNION ALL

 Select name,
        SUM(DECODE(TO_CHAR(Datee,'MM'),'01',PRICE)) JAN_11,
        SUM(DECODE(TO_CHAR(Datee,'MM'),'02',PRICE)) FEB_11
  from price_list_TwoLastYear.

When I execute the query, In my column header I get name, JAN_12, FEB_12.
I want to combine my results like : name, JAN_11, JAN_12, FEB_11,FEB_12.

Answer 1

Try this

SELECT A.*, B,JAN_11, B.FEB_11 FROM (
Select name,
       SUM(DECODE(TO_CHAR(Datee,'MM'),'01',PRICE)) JAN_12,
       SUM(DECODE(TO_CHAR(Datee,'MM'),'02',PRICE)) FEB_12
 from price_list_LastYear
 Group By Name) A

 LEFT OUTER JOIN (

 Select name,
        SUM(DECODE(TO_CHAR(Datee,'MM'),'01',PRICE)) JAN_11,
        SUM(DECODE(TO_CHAR(Datee,'MM'),'02',PRICE)) FEB_11
  from price_list_TwoLastYear
  Group By Name) B ON A.name = B.Name

Or

Select name,
SUM(CASE WHEN Yr = '11' THEN DECODE(Mnth,'01',PRICE) ELSE NULL END) JAN_11,
SUM(CASE WHEN Yr = '12' THEN DECODE(Mnth,'01',PRICE) ELSE NULL END) JAN_12,
SUM(CASE WHEN Yr = '11' THEN DECODE(Mnth,'02',PRICE) ELSE NULL END) FEB_11,
SUM(CASE WHEN Yr = '12' THEN DECODE(Mnth,'02',PRICE) ELSE NULL END) FEB_12
from 
(

 SELECT '12' As yr, name, TO_CHAR(Datee,'MM') Mnth, Price
 FROM price_list_LastYear
 UNION ALL
 SELECT '11' As yr, name, TO_CHAR(Datee,'MM') Mnth, Price
 FROM price_list_TwoLastYear
)
GROUP BY Name