Hi
use this and make it variable as dimension.
Variable : =If IsNull(Part_Number) Then (QY.[Quary1]) Else Part_Number
you are getting multivalue error beacuse there are two records are for country india.
or you want to display max for each coumtry.
Variable : =If IsNull(Part_Number) Then (QY.[Quary1]) Else max(Part_Number)ForEach (Part_Number / from Merge)
Amit