#multivalue in two quary report ( Merge )

Hi All ,

i have a problem with multivalue in report of two quary and Merge between

its simple :

quary 1 objects : Part_Number , // only QY ( Meausure)

quary 2 objects: Part_Number , // only  Serial_Number

Merge : Part_Number.Quary1 = Part_Number.Quary2

Variable :    =If IsNull(Part_Number) Then QY.[Quary1]  Else Part_Number ForEach (Part_Number / from Merge)

I want to see one column Part_Number and QY or Serial_Number for ALL , if the Part_Number have a QY is QY else All Serial_Number but order by  the Part_Number

issue is:  once the Part_Number including ONE Serial_Number then his visible if a Part_Number including several Serial_Numbers then multivalue

Help me Please