Power BI Report Builder: DAX query to retrieve last week (Sunday - Saturday)

[andreas789]

Hello, I need a DAX query, to query a power bi dataset for values in the last week and is equivalent to the following one:

  VAR __DS0FilterTable = 
    FILTER(
      KEEPFILTERS(VALUES('salesty'[TRANS_DATE])),
      AND(
        'salesty'[TRANS_DATE] >= DATE(2022, 1, 2),
        'salesty'[TRANS_DATE] < DATE(2022, 1, 9)
      )
    )

Basically, I think I need a DAX formula to get last week's values between Saturday and Saturday.

[andreas789 · Accepted solution]

Thanks everybody for your suggestions.

Since the dataset was getting updated every monday, I was able to find a solution by using MAX function and subtracting the days.

[ValtteriN]

Hi,

You can use Weeknum to get this result. So something like this:

LastWeekT =

var weeknumLW = WEEKNUM(TODAY())-1

VAR __DS0FilterTable =

FILTER(

'LastWeek',

WEEKNUM('LastWeek'[Date])=weeknumLW

)

return

__DS0FilterTable

The default setting for WEEKNUM starts from Sunday so with this you should get last week with this dax. 

End result (visualized):
Now you can just refer to this var tables columns e.g. in SUMX and you cant get the results you want. I hope this helps and if it does consider accepting this as a solution and giving the post a thumbs up!

[amitchandak]

@andreas789 , You need these new columns in date tbale

new columns
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],1)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],1)
Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)
OR
Week Rank = RANKX(all('Date'),'Date'[Year Week],,ASC,Dense) //YYYYWW format

then  measures
This Week = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=max('Date'[Week Rank])))
Last Week = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=max('Date'[Week Rank])-1))

Power BI — Week on Week and WTD
https://medium.com/@amitchandak.1978/power-bi-wtd-questions-time-intelligence-4-5-98c30fab69d3
https://community.powerbi.com/t5/Community-Blog/Week-Is-Not-So-Weak-WTD-Last-WTD-and-This-Week-vs-La...
https://www.youtube.com/watch?v=pnAesWxYgJ8

Hope the same work in report builder