Row_Number for most used returning all rows

Question

I have this query

select ProductID, ARPVend, count(distinct whsecode) as RN 
    FROM 
        (select pa.product_structure_fk, pid.value as productID, 
             ei.value as ARPVend, ei2.value as whsecode 
        from epacube.PRODUCT_ASSOCIATION pa
            inner join epacube.PRODUCT_IDENTIFICATION pid 
                on pa.PRODUCT_STRUCTURE_FK = pid.PRODUCT_STRUCTURE_FK
            inner join import.IMPORT_RECORD_DATA ird 
                on pid.VALUE = ird.DATA_POSITION20 and ird.JOB_FK = 1514
            inner join epacube.ENTITY_IDENTIFICATION ei 
                on ei.ENTITY_STRUCTURE_FK = pa.ENTITY_STRUCTURE_FK
            inner join epacube.ENTITY_IDENTIFICATION ei2 
                on pa.ORG_ENTITY_STRUCTURE_FK = ei2.ENTITY_STRUCTURE_FK 
        where pa.DATA_NAME_FK = 253501

        UNION

        SELECT distinct pid.Product_structure_fk, 
            data_position20, data_position3, 
            data_position78 
        from Import.IMPORT_RECORD_DATA ird
            inner join epacube.product_identification pid
                on ird.DATA_POSITION20 = pid.VALUE where ird.JOB_FK = 1514
       )a
       group by ProductID, ARPVend

that returns this result set (3392 records)

ProdID      ARPVend RN
026819143   26815   1
026900102   65187   1
026900102   83551   2
061812104   80705   1
061820327   80705   1
061820327   100538  2
061820578   74868   1
061820578   69124   2
061824934   93617   1
061825815   30392   1

From this result set I would like to return the most used vendor for the product

ProdID      AROVend RN
026819143   26815   1
026900102   83551   2
061812104   80705   1
061820327   100538  2
061820578   69124   2
061824934   93617   1
061825815   30392   1

I have tried to wrap the above query in another query to use Row_Number to rank my Product per Vendor:

Select ProductID, ARPVend, 
 Row_Number() over(partition by ProductID Order by rn desc)
from (query above)a

This query also returns 3392 records when I would expect there to be less records. Any suggestions as to what I am doing incorrectly?

Thanks for any help.

leslie

Answer 1

The question is unclear, but if you want to get the second set from first you have metioned in post, use this:

SELECT ProductID, ARPVend, RN
FROM
(
  SELECT ProductID, ARPVend, RN, 
          Row_Number() OVER(PARTITION BY ProductID ORDER BY RN DESC) ROWNUM
  FROM firstresultset
) A
WHERE ROWNUM = 1