PowerBI：按日期过滤

Question

我有一个查询，我想按我创建的新日期列对其进行过滤。

基本上，任何比该日期早 42 天的都可以接受。

我试过按日期筛选，然后再减去 42，但还是不行？

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

假设你想通过DateStamp列过滤接受比Start_of_QTR早42天的，你可以在#"Added Custom1"行后添加如下行：

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

Answer 2

如果我对你的任务的理解正确，你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

PowerBI：按日期过滤

PowerBI: Filter by date

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