Отредактируйте запрос с помощью Power Query и используйте Table.FillDown
для заполнения пробелов.
Например:
let
Source = Excel.Workbook(File.Contents("C:\Temp\Salesforce.xlsx"), null, true),
Sheet1_Sheet = Source{[Item="Sheet1",Kind="Sheet"]}[Data],
#"Promoted Headers" = Table.PromoteHeaders(Sheet1_Sheet, [PromoteAllScalars=true]),
#"Filled Down" = Table.FillDown(#"Promoted Headers",{"Vendor", "Shipping City"})
in
#"Filled Down"