powerquery countif以前的日期

您可以使用list和table函数来完成这类工作。我两个都给你看。

let
    Source = Excel.CurrentWorkbook(){[Name="tblCarSales"]}[Content],
    #"Added Custom" = Table.AddColumn(Source, "Previous Sale Count",
                         (C) => List.Count(List.Select(Source[Sale Date],
                                each _ < C[Sale Date]))),
    #"Added Custom1" = Table.AddColumn(#"Added Custom", "Previous Sale Count By Make",
                         (C) => Table.RowCount(Table.SelectRows(Source,
                                (S) => S[Sale Date] < C[Sale Date] and S[Make] = C[Make])))
in
    #"Added Custom1"

我们必须使用这些函数,以便power query知道我们在哪个上下文中查看列。为了进一步阅读,请查看此 Power Query M Primer 是的。