Calculate OR SUMX alternatives in Language M

[DataVitalizer]

Hi Community,

Is there any alterantive way to rewrite the below formula in Language M:

CALCULATE(SUM[CA],PREVIOUSMONTH([Date]))

Thank you in advance. 

[Jimmy801 · Accepted solution]

Hello @DataVitalizer 

You can filter you table with Table.SelectRows and then sum the CA-column

    SumPreviousMonth = List.Sum(Table.SelectRows(PreviousStep, each Date.IsInPreviousNMonths(_[Date], 1))[CA])

Here a complete code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("TczJDcAwCETRXjhbiCW2SS3I/bdhkILC9Y3+uMOEASJILwrBGQ5PABuSFWjCbiAJqwEnUPuYX7ILVoIiaYEFxPwnTClWci4=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [CA = _t, Date = _t]),
    PreviousStep = Table.TransformColumnTypes(Source,{{"CA", Int64.Type}, {"Date", type date, "de-DE"}}),
    SumPreviousMonth = List.Sum(Table.SelectRows(PreviousStep, each Date.IsInPreviousNMonths(_[Date], 1))[CA])
in
    SumPreviousMonth

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy

[DataVitalizer]

Hi @Jimmy801 ,

I just tried the suggested formula and got 9 as result, although I did not not understand  what the su of 9 represents could that formula be used to return the previous month value for each line instead ?

Thank in you advance.

[Jimmy801]

Hello @DataVitalizer 

to show how it works, i just invented a database on my own. So using this table, the result is 9

As you were stating sumx and previous month, i meant, that your result need to be a number (like a measure). But you could also add a column, and replacing the DateTimeFixedLocal with your Date-column.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy

[DataVitalizer]

Hi @Jimmy801 

Below I am sharing a sample, using DAX I was able to create the two caclculated columns but I am trying to reach the same result within Power Query.

So as you can see in each line we are returning the sum either of the prevous month or previous year.

Rubrique	IND L1	Annee	Values	Previous Month	Previous Year
R1	IND_1	1/1/2017	100	0	0
R1	IND_1	1/2/2017	150	100	0
R1	IND_1	1/2/2018	200	0	150

Thank you in advance.

[Jimmy801]

Hello @DataVitalizer 

in DAX you can use relations, what you cannot use in Power query. I've created now 2 tables and in the second table with only  a date-column i added a new column, that sums values of the actual-table, searching for previous-month

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("TczJDcAwCETRXjhbiCW2SS3I/bdhkILC9Y3+uMOEASJILwrBGQ5PABuSFWjCbiAJqwEnUPuYX7ILVoIiaYEFxPwnTClWci4=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [CA = _t, Date = _t]),
    Actuals = Table.TransformColumnTypes(Source,{{"CA", Int64.Type}, {"Date", type date, "de-DE"}}),
    YourDateTable = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMrTQM7DQMzJQitUBcgz0DCzhHGM9A2MwJxYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Date = _t]),
    ChangedTypeOfDate = Table.TransformColumnTypes(YourDateTable,{{"Date", type date}}),
    AddPreviousMonthToYourTable = Table.AddColumn
    (
        ChangedTypeOfDate,
        "PreviousMonth",
        (row)=>
        List.Sum(Table.SelectRows(Actuals, each _[Date]>= Date.StartOfMonth(Date.AddMonths(row[Date], -1)) and _[Date]<= Date.EndOfMonth( Date.AddMonths(row[Date],-1)))[CA])
    )


in
    AddPreviousMonthToYourTable

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy