let
Source = Excel.CurrentWorkbook(){[Name="Tableau1"]}[Content],
ModType = Table.TransformColumnTypes(Source,{{"Date Livraison", type date}, {"Code groupage", type text}, {"SITE", type text}, {"N° CDE", type text}, {"N° BL", Int64.Type}}),
GroupBy = Table.Group(ModType, {"Code groupage", "SITE", "Date Livraison"}, {{"Nombre", each Table.RowCount(_), Int64.Type}, {"BL", each List.Min([#"N° BL"]), Int64.Type}})
in
GroupBy