This week in Dax

[Anonymous]

Hi,

I am needing to to do a caulate measure to find out this weeks amount and last weeks amount.

Would it be something like

if(calender.day = Tuesday(calculate(calculate,sum(value),calenderdate-1),calenderdate-1)

What would be the best way to acheive this?

Thanks

Chris

[Greg_Deckler · Accepted solution]

I created the following two enter data queries:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("Vc7BCQAhDEXBXjwvxPysxq1F7L8NQVjwHec2c5Y076bqWdZzlNCAvluqkEOCAnqhBuEiXISLcAlc4roMA/7X2g==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type date}})
in
    #"Changed Type"

That one is called Calendar.

The next one is called Values:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("Rc/BDYAgEAXRXjibwF/QhVoI/behUWe5vtPMnMmzrmxFno6ktI5XHDGkIxUZSPvFCnIiQi7EEEcq0pGGDOSMwgLtaKotqkW2RbbotugW4TXCRXmNcn3pPW/xX+JFT/q6AQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Date = _t, Value = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type date}, {"Value", Int64.Type}})
in
    #"Changed Type"

Related the tables on "Date" column.

Created the following calculated colunm in both tables:

Weeknum = WEEKNUM([Date])

Created the following Measure:

MyTotal = VAR myMax = MAX('Calendar'[Weeknum]) RETURN CALCULATE(SUM([Value]),ALLEXCEPT('Values','Values'[Weeknum]),'Values'[Weeknum]=myMax)