Hello,
Essaie ça
let
Source = Excel.CurrentWorkbook(){[Name="Tableau1_2"]}[Content],
#"Type modifié" = Table.TransformColumnTypes(Source,{{"Client", type text}, {"Dates", type date}, {"Montant", Int64.Type}, {"Dates revues", type datetime}}),
#"Lignes triées" = Table.Sort(#"Type modifié",{{"Client", Order.Ascending}, {"Dates", Order.Descending}}),
#"Lignes groupées" = Table.Group(#"Lignes triées", {"Client"}, {{"Date Max", each Record.Field(Table.First(_),"Dates")},{"Montant", each Record.Field(Table.First(_),"Montant")}})
in
#"Lignes groupées"
@+