DateKey 格式为 YYYYMMDD

Question

我有以下日历 table 脚本：

let
    StartDate = #date(2016, 1, 1),
    EndDate = #date(2018, 12, 31),
    CurrentDate = DateTime.Date(DateTime.FixedLocalNow()),
    FiscalYearEndMonth = 6,
    ListDates = List.Dates(StartDate, Number.From(EndDate - StartDate)+1, #duration(1,0,0,0)),
    #"Converted to Table" = Table.FromList(ListDates, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Renamed Columns as Date" = Table.RenameColumns(#"Converted to Table",{{"Column1", "Date"}}),
    #"Changed Type to Date" = Table.TransformColumnTypes(#"Renamed Columns as Date",{{"Date", type date}}),
    #"Added Calendar MonthNum" = Table.AddColumn(#"Changed Type to Date", "MonthNum", each Date.Month([Date]), Int64.Type),
    #"Added Calendar Year" = Table.AddColumn(#"Added Calendar MonthNum", "Year", each Date.Year([Date]), Int64.Type),
    #"Added MonthYearNum" = Table.AddColumn(#"Added Calendar Year", "MonthYearNum", each [Year]*100 + [MonthNum] /*e.g. Sep-2016 would become 201609*/, Int64.Type),
    #"Added Day Num" = Table.AddColumn(#"Added MonthYearNum", "DayNum", each Date.Day([Date])),
    #"Changed Type1" = Table.TransformColumnTypes(#"Added Datekey",{{"DayNum", Int64.Type}}),    
    #"Added Datekey" = Table.AddColumn(#"Added Day Num", "DateKey", each [Year]*100 + [MonthNum] + [DayNum]),
    #"Changed Type" = Table.TransformColumnTypes(#"Changed Type1",{{"DayNum", Int64.Type}, {"DateKey", Int64.Type}})
in
    #"Changed Type"

结果如下：

所以最后一列让我头疼 - 我认为该列的代码是：

each [Year]*100 + [MonthNum] + [DayNum]

这个表达式的前两个元素似乎按预期连接在一起，但随后添加了 DayNum，例如对于 1 月 1 日，我们将 2016 与 1 连接起来得到 201601 但随后 DayNum 以数学方式添加到它，得到 201602 但我希望它给出 20160101 （格式 YYYYMMDD）

为什么会发生这种情况？M/PowerQuery 避免这种行为的正确方法是什么？

Answer 1

我相信就它所做的而言，您是正确的。改成这个怎么样？

each [Year]*10000 + [MonthNum]*100 + [DayNum]

或者你可以

each [MonthYearNum]*100 + [DayNum]

DateKey 格式为 YYYYMMDD

DateKey formatted as YYYYMMDD

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