Summing multiple time

Question

I've got a query that looks like this
SELECT C.NAME CUSNAME, E.FIRST_NAME||' '||E.LAST_NAME SALESPERSON, SUM(S.TOTAL) SALES, R.DESCRIPTION PRODUCTDES,
(R.VALUE/SUM(S.TOTAL))*100 TOTAL
FROM ITEM I, SALES_ORDER S, CUSTOMER C, employee e,
(SELECT * FROM (select S.CUSTOMER_ID, P.DESCRIPTION, SUM(I.TOTAL) VALUE,
ROW_NUMBER() over (partition by S.CUSTOMER_ID ORDER BY SUM(I.TOTAL) DESC) AS RN
FROM ITEM I, SALES_ORDER S, PRODUCT P
WHERE P.PRODUCT_ID = I.PRODUCT_ID
AND S.ORDER_ID = I.ORDER_ID
GROUP BY
S.CUSTOMER_ID,P.DESCRIPTION) WHERE RN = 1) R
WHERE S.ORDER_ID = I.ORDER_ID AND C.CUSTOMER_ID = S.CUSTOMER_ID AND E.EMPLOYEE_ID = C.SALESPERSON_ID
AND R.CUSTOMER_ID = S.CUSTOMER_ID
group by c.name, e.first_name, e.last_name, r.description, r.value;
Every thing is fine in it apart from the fact that the Sum(s.total) in the first line returns a value that is 4 times the value it should be. I don't know why this is, it must be entering the same table 4 times. Can anyone solve this problem.

Answer 1

You could put your text between [ pre ] and [ / pre ] in order to preserve the format.
Something like below.
SELECT C.NAME CUSNAME,
       E.FIRST_NAME||' '||E.LAST_NAME SALESPERSON,
       SUM(S.TOTAL) SALES,
       R.DESCRIPTION PRODUCTDES,
       (R.VALUE/SUM(S.TOTAL))*100 TOTAL
FROM ITEM I,
     SALES_ORDER S,
     CUSTOMER C,
     employee e,
     (SELECT * FROM
         (select S.CUSTOMER_ID,
                 P.DESCRIPTION,
                 SUM(I.TOTAL) VALUE,
                 ROW_NUMBER() over (partition by S.CUSTOMER_ID ORDER BY SUM(I.TOTAL) DESC) AS RN
          FROM ITEM I,
               SALES_ORDER S,
               PRODUCT P
          WHERE P.PRODUCT_ID = I.PRODUCT_ID
          AND S.ORDER_ID = I.ORDER_ID
          GROUP BY S.CUSTOMER_ID,
                   P.DESCRIPTION
      WHERE RN = 1
     ) R
WHERE S.ORDER_ID = I.ORDER_ID
AND C.CUSTOMER_ID = S.CUSTOMER_ID
AND E.EMPLOYEE_ID = C.SALESPERSON_ID
AND R.CUSTOMER_ID = S.CUSTOMER_ID
group by c.name,
         e.first_name,
         e.last_name,
         r.description,
         r.value;