Determine if date is between 2 dates, return value, and turn into query

[ea]

I have the following two tables:
"WkRng"

and "AllDates"

I am trying to create a new column called "WkNum" in "AllDates" table but while I was successful in using the below to do it in the Data tab, I'm very new to Power BI, and am trying to turn the following into a query so that I can apply it to other similar files:

Week Number = CALCULATE(

VALUES(WkRng[Week]),

FILTER(

'WkRng',

'WkRng'[Start Date]<= EARLIER ('AllDates'[Request date])

&& 'WkRng'[End Date]>= EARLIER ('AllDates'[Request date])))

I was able to use the above to create column WkNum in the AllDates table in the Data tab, but I would like to try to use the Query editor so that I can apply this more readily and easily to other similar files. However, I am running into errors trying to use the above in the Custom Column editing box.

Again, very new to Power BI and Queries, so your advice is appreciated. I do wish to keep the use of my "WkRng" table, as the ranges are not uniform, even though the first few rows are displayed as such.

[LivioLanzo · Accepted solution]

Hi ea you can do it like this in the query editor: let Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("Vc7BCcAwDATBXvwOyCfHklyLcf9tBAIhd8957e7dwnyad1Q716sQpahEizX6rzQwnDEYN2MygpGMYiyJ6oI8QCYgF5ANfB/nAQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [#"Request Date" = _t]), AllDates = Table.TransformColumnTypes(Source,{{"Request Date", type date}}), Source2 = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtM3MtU3MjC0UNJRMtc3hDENlWJ1ooECRgg5CxjTCCpniaQPboaxUmwsAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [#"Start Date" = _t, #"End Date" = _t, Week = _t]), WkRng = Table.TransformColumnTypes(Source2,{{"Start Date", type date}, {"End Date", type date}, {"Week", Int64.Type}}), fnGetWeekRow = (dt as date, tbl as table) as table => Table.SelectRows(tbl, each [Start Date] <= dt and [End Date] >= dt), AddedWeek = Table.AddColumn(AllDates, "WeekNum", each fnGetWeekRow([Request Date], WkRng), type table), ExpandedWeekNum = Table.ExpandTableColumn(AddedWeek, "WeekNum", {"Week"}, {"Week"}) in ExpandedWeekNum