Power Query – Week start and end dates in same column

Someone asked me the other day below thing: “On the same column I want a Range of dates not Duration between two dates So I have a Creation date and fulfillment date I need to come up with a column of weekly Range like for example
10/21 – 10/27
10/28 – 11/01
11/02 – 11/09
Something like this.

The solution can be pretty simple and mostly done through Power Query’s GUI.
Add a date range first using either way you want.
Then under Add Column – Date, you can easy add “Start of Week” and “End of Week”.

Note that if your week starts on Sunday, you don’t need to provide the first day of the week. I need my week to start on Monday so I added 1, instead of 0 or nothing “Date.EndOfWeek([Date],1)“.

The only thing to do now is to merge these two columns and put a separator of your choice. This will give you a column with Week’s start and end dates in the long format.


If you want month and date (or only date) you need to extract month and then date separately from both your Start and End of Week columns. Then merge month and date from Start of the week and again from End of the week.

At this moment, you only need to merge these 2 last columns, remove all unneeded columns and that’s it.


Here’s the entire query I ended up with.

Query1 = let
Source = #date(2019,1,1),
Custom1 = List.Dates(Source, Number.From(DateTime.LocalNow())- Number.From(Source) ,#duration(1,0,0,0)),
#"Converted to Table" = Table.FromList(Custom1, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
#"Changed Type" = Table.TransformColumnTypes(#"Converted to Table",{{"Column1", type date}})
#"Converted to Table",
#"Changed Type" = Table.TransformColumnTypes(Query1,{{"Column1", type date}}),
#"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"Column1", "Date"}}),
#"Sorted Rows" = Table.Sort(#"Renamed Columns",{{"Date", Order.Descending}}),
#"Inserted Start of Week" = Table.AddColumn(#"Sorted Rows", "Start of Week", each Date.StartOfWeek([Date],1), type date),
#"Inserted End of Week" = Table.AddColumn(#"Inserted Start of Week", "End of Week", each Date.EndOfWeek([Date],1), type date),
#"Inserted Merged Column" = Table.AddColumn(#"Inserted End of Week", "Long range", each Text.Combine({Text.From([Start of Week], "en-US"), Text.From([End of Week], "en-US")}, " - "), type text),
#"Inserted Month" = Table.AddColumn(#"Inserted Merged Column", "Month", each Date.Month([Start of Week]), Int64.Type),
#"Inserted Day" = Table.AddColumn(#"Inserted Month", "Day", each Date.Day([Start of Week]), Int64.Type),
#"Merged Columns" = Table.CombineColumns(Table.TransformColumnTypes(#"Inserted Day", {{"Month", type text}, {"Day", type text}}, "en-US"),{"Month", "Day"},Combiner.CombineTextByDelimiter("/", QuoteStyle.None),"Start"),
#"Inserted Month1" = Table.AddColumn(#"Merged Columns", "Month", each Date.Month([End of Week]), Int64.Type),
#"Inserted Day1" = Table.AddColumn(#"Inserted Month1", "Day", each Date.Day([End of Week]), Int64.Type),
#"Merged Columns1" = Table.CombineColumns(Table.TransformColumnTypes(#"Inserted Day1", {{"Month", type text}, {"Day", type text}}, "en-US"),{"Month", "Day"},Combiner.CombineTextByDelimiter("/", QuoteStyle.None),"End"),
#"Merged Columns2" = Table.CombineColumns(#"Merged Columns1",{"Start", "End"},Combiner.CombineTextByDelimiter(" - ", QuoteStyle.None),"Short range"),
#"Removed Columns" = Table.RemoveColumns(#"Merged Columns2",{"Start of Week", "End of Week"})
#"Removed Columns"

Examples of Count, Count IF, Count duplicates in SQL


SELECT [ProductModel], COUNT(1) CNT
FROM [AdventureWorks2017].[Production].[vProductAndDescription]
GROUP BY [ProductModel]

Count “if”:

SELECT [ProductModel], [Name],COUNT(1) CNT
FROM [AdventureWorks2017].[Production].[vProductAndDescription]
WHERE [ProductModel] LIKE '%Frame' AND [Name] LIKE '%52' --here's the IF statement
GROUP BY [ProductModel], [Name]

Count duplicates:

SELECT [ProductModel], COUNT(1) CNT -- select a field you want to search for duplicates in
FROM [AdventureWorks2017].[Production].[vProductAndDescription]
GROUP BY [ProductModel] HAVING COUNT(1) > 1 -- if count is greater than 1, then it is a duplicate by that field

Group count fields a tabular form:

SELECT [ProductModel], [Name], COUNT(1) CNT
FROM [AdventureWorks2017].[Production].[vProductAndDescription]
GROUP BY [ProductModel], [Name]