powerbi - PowerBI：按日期过滤

Question

我有一个查询，我想按我创建的新日期列进行过滤。

基本上，任何比该日期早 42 天的都可以接受。

我试过按日期进行过滤，然后将其减去 42，但它不起作用？

let
    #"SQL-JM" = let
    Source = Sql.Databases("xxx.xxx.xxx.xxx"),
    MNH = Source{[Name="DBT"]}[Data],
    #"DBO-JM" = DBT{[Schema="dbo",Item="DBO-JM"]}[Data]
in
    #"DBO-JM",
    #"Added Custom1" = Table.AddColumn(#"DBO-JM", "Start_of_QTR", each Date.StartOfQuarter(DateTime.LocalNow())),
in
    #"Filtered Rows"

Answer 1

如果我正确理解您的任务，您根本不需要自定义列。

我会这样做：

let
    #"SQL-JM" = let
    Source = Sql.Databases("xxx.xxx.xxx.xxx"),
    MNH = Source{[Name="DBT"]}[Data],
    #"DBO-JM" = DBT{[Schema="dbo",Item="DBO-JM"]}[Data],
    GetFilterDate = Date.From(Date.StartOfQuarter(DateTime.LocalNow())), //You can use any logic to get that date
    FilterRows = Table.SelectRows(#"DBO-JM", each [DateStamp] < GetFilterDate) //You can also add some modifications to GetFilterDate using each row's values, if you need
in
    FilterRows

Answer 2

假设您要按DateStamp早于 42 天的列进行过滤Start_of_QTR，您可以在 #"Added Custom1" 行之后添加以下行：

#"Filtered Rows" = Table.SelectRows(#"Added Custom1", each [DateStamp] < Date.AddDays([Start_of_QTR], -42))