topic Re: Rolling 12 Month Headcount Sum as of Start of Year in DAX Commands and Tips

Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Thu, 03 Feb 2022 17:00:30 GMT

Hi all,

I am stuck once again! My goal is to create a Rolling 12 Month Headcount Sum measure as of the start of the year. For example, headcount as of 1/1/2021 was 2,690. I want to apply this to every month in 2021 and then sum for those 12 months resulting in a total of 32,280. To complicate this a little bit more here is another example. Since it is February 2022, I would want to calculate a sum of the last 12 months knowing that the start of year headcount was 2,690 in 2021 and is now 3,007 in 2022. The expected measure would sum 2 months of 2022 at 3,007 headcount and 10 months of 2021 at 2,690 for a total of 32,914. I hope this makes sense as I have a difficult time trying to describe this.

Here is a table of my data:

Year	Month	Start of Year Headcount	Rolling 12 Month Headcount Sum	Expected Result
2021	Jan	2,690
2021	Feb	2,690
2021	Mar	2,690
2021	Apr	2,690
2021	May	2,690
2021	Jun	2,690
2021	Jul	2,690
2021	Aug	2,690
2021	Sept	2,690
2021	Oct	2,690
2021	Nov	2,690
2021	Dec	2,690	2,690	32,280
2022	Jan	3,007	3,007	32,597
2022	Feb	3,007	3,007	32,914

Here is the DAX for Start of Year Headcount and Rolling 12 Month Headcount Sum:

Start of Year Headcount = CALCULATE ( COUNTROWS ( Headcount ), STARTOFYEAR ( 'Date'[Date] ) )

Rolling 12 Month Headcount Sum = CALCULATE ( [Start of Year Headcount], DATESBETWEEN ( 'Date'[Date], NEXTDAY ( SAMEPERIODLASTYEAR ( LASTDATE ( 'Date'[Date] ) ) ), LASTDATE ( 'Date'[Date] ) ) )

Thanks in advance for your time and efforts! Please let me know if I can supply any additional information that may be helpful.

Re: Rolling 12 Month Headcount Sum as of Start of Year

ValtteriN — Wed, 02 Feb 2022 16:27:38 GMT

Hi,

Try something like this:

CALCULATE ( [Start of year headcount], DATESBETWEEN ( 'Calendar'[Date], DATEADD ( LASTDATE ( DATEADD ( 'Calendar'[Date], -12, MONTH ) ), +1, DAY ), LASTDATE ( 'Calendar'[Date] ) )  )

I hope this post helps to solve your issue and if it does consider accepting it as a solution and giving the post a thumbs up!

My LinkedIn: https://www.linkedin.com/in/n%C3%A4ttiahov-00001/

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Wed, 02 Feb 2022 16:38:43 GMT

Thank you for the response. I tried your suggestion, but I get the same values as my Rolling 12 Month Headcount Sum measure.

Re: Rolling 12 Month Headcount Sum as of Start of Year

ValtteriN — Wed, 02 Feb 2022 16:49:35 GMT

CatManKuhn

What kind of relationship do you have between your fact table and calendar table?

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Wed, 02 Feb 2022 17:03:57 GMT

I have a many to one relationship between Headcount and Date.

Re: Rolling 12 Month Headcount Sum as of Start of Year

serpiva64 — Wed, 02 Feb 2022 17:30:15 GMT

Hi,

Try creating this measure

Date = DATEVALUE("01-"&'Table'[Month]&"-"&'Table'[Year])

then link it to your date table.

Then with this measure all function:

12 Month Running Total =

Var SelectedMaxDate = MAX ( Dates[Date] )

Var MinDate =

CALCULATE (

MIN ( Dates[Date] ),

FILTER (

ALL ( Dates ),

DATEADD (

Dates[Date],

YEAR

) >= SelectedMaxDate

)

Return

CALCULATE (

SUM ( 'Table'[Start of Year Headcount] ),

ALL ( Dates ),

Dates[Date] <= SelectedMaxDate,

Dates[Date] >= MinDate

)

I hope this solution is able to help you to solve your issue and if it does consider giving the post a thumbs up or accept it as a solution!

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Thu, 03 Feb 2022 15:56:53 GMT

Thank you for the response. The Date measure results in an error. I tried the other measure, but it only returns the start of year headcount value.

Re: Rolling 12 Month Headcount Sum as of Start of Year

serpiva64 — Thu, 03 Feb 2022 17:44:15 GMT

Hi,

this is the result i obtained.

To do this i create a query:

let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("fdFBC8IgGAbgv/Lh2YNz1doxqIjBCrZTjB1ssxWYjqVR/z63sfJQgvqCzwuKFgU6ctYhjFIl9cVmrlmnQZ2h34cdZ3WljNRWMiXEVTYQUBjKX4Tc3Gxh82x5pXkNGb8boVGJC0QJDSwlTNqVLmJiox+ObfmpNzwiDNPhdLjeX161Xk7Zy8eJkX4W3rNN4+Oct9rnh8rLe/Xw8ZpXDk8ZUkyXZOrRz9OHmJDITYrnceT2xm/40YuDGSrLNw==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Year = _t, #"(blank)" = _t, #"(blank).1" = _t, #"(blank).2" = _t, #"(blank).3" = _t]),
#"Promoted Headers" = Table.PromoteHeaders(Source, [PromoteAllScalars=true]),
#"Replaced Value" = Table.ReplaceValue(#"Promoted Headers",",","",Replacer.ReplaceText,{"Start of Year Headcount", "Rolling 12 Month Headcount Sum", "Expected Result"}),
#"Changed Type" = Table.TransformColumnTypes(#"Replaced Value",{{"Year", Int64.Type}, {"Month", type text}, {"Start of Year Headcount", type number}, {"Rolling 12 Month Headcount Sum", type number}, {"Expected Result", type number}})
in
#"Changed Type"

Then i used my usual query to create the date table and load to the model.

This is the relationship:

Date = DATEVALUE("01-"&'Table'[Month]&"-"&'Table'[Year])

is a column in Table and "12 Month Running Total" is a mesure:

Re: Rolling 12 Month Headcount Sum as of Start of Year

Anonymous — Tue, 15 Feb 2022 08:46:51 GMT

Hi CatManKuhn ,

You could try edate() function.

Check this measure:

Measure = SUMX(FILTER(ALLSELECTED('Table'),'Table'[date]>EDATE(SELECTEDVALUE('date'[date]),-12)&&'Table'[date]<=SELECTEDVALUE('date'[date])),'Table'[Start of Year Headcount])

Best Regards,

Jay

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Tue, 15 Feb 2022 17:05:17 GMT

This works perfectly in your example, but I don't get any values when I enter this. It is entirely null. Any ideas why this may be?

Measure Test = SUMX(FILTER(ALLSELECTED('Headcount'),'Headcount'[Date]>EDATE(SELECTEDVALUE('Date'[Date]),-12)&&'Headcount'[Date]<=SELECTEDVALUE('Date'[Date])),'Headcount'[Start of Year Headcount])

Thank you!!

Re: Rolling 12 Month Headcount Sum as of Start of Year

Anonymous — Wed, 16 Feb 2022 09:09:50 GMT

Hi CatManKuhn ,

Not very certain. I created the demo based on the data you shared above. Is it possible that some conditions were ignored? You may try the below formula again. If it still doesn't work, please share the pbix.

Measure Test = SUMX(FILTER(ALL('Headcount'),format('Headcount'[Date],"YYYYMM")>format(EDATE(SELECTEDVALUE('Date'[Date]),-12),"YYYYMM")&&format('Headcount'[Date],"YYYYMM")<=format(SELECTEDVALUE('Date'[Date]),"YYYYMM")),'Headcount'[Start of Year Headcount])

Best Regards,

Jay

Re: Rolling 12 Month Headcount Sum as of Start of Year

serpiva64 — Wed, 16 Feb 2022 09:22:05 GMT

Sorry but i forgot to insert the measure:

12 Month Running Total =

Var SelectedMaxDate = MAX ( Dates[Date] )

Var MinDate =

CALCULATE (

MIN ( Dates[Date] ),

FILTER (

ALL ( Dates ),

DATEADD (

Dates[Date],

YEAR

) >= SelectedMaxDate

)

Return

CALCULATE (

SUM ( 'Table'[Start of Year Headcount] ),

ALL ( Dates ),

Dates[Date] <= SelectedMaxDate,

Dates[Date] >= MinDate

)

Regarding the date maybe it depends on your local formatfor date? Be sure that Date is a calculated column

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Wed, 16 Feb 2022 20:47:56 GMT

Where are you creating the Date column? On the date table, headcount table (where Start of Year headcount exists), or a new table? I am confused by the "link it to your date table" statement.

Thanks!

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Wed, 16 Feb 2022 20:50:30 GMT

I will work to upload a pbix file. I will have to create a fake data set as this is sensitive data that I cannot share as it currently exists. What is the relationship betweent the Date and Headcount tables in your example? Is it joined on Date[Date] and Headcount[Date]?

Thanks!

Re: Rolling 12 Month Headcount Sum as of Start of Year

CatManKuhn — Wed, 16 Feb 2022 21:32:26 GMT

I should clarify. My Date table is at the day level. In the table, above I am using a date hierarchy. The trick here is that Headcount table is at the month end and start of year level. This means there are 13 dates in a completed year. I want to return the start of year value for each month in a year, sum this up and divide by 12 for the number of months in a year. I think the issue I am having is that I am filtering the Start of Year Headcount to the first day of the year. When I use other time intelligence functions it is considering only the first day of the year so it doesn't sum the start of year value for 12 months. This is pretty confusing so I apologize if this is not clear.

Re: Rolling 12 Month Headcount Sum as of Start of Year

serpiva64 — Wed, 16 Feb 2022 22:22:02 GMT

Hi,

this is the model.

My values and table

My column date in table

Date = DATEVALUE("01-"&'Table'[Month]&"-"&'Table'[Year])

and MonthInt in Dates

That's all.

I try to study if it is possible to share the Pbix