Week Over Week Percentage Change in a table or Matrix table by Supplier or Department

[Vari209]

I hope everyone had a great weekend! 😊

Would anyone know how to show WoW percent change for a specific grouping in a table or matrix table? - for example the screen shot below in excel (example only not real totals) is showing Facebook current week amount total for 91-180 days is $4M and the % change from the previous week is -4%. How would I show this exact example in a table or matrix table in PowerBi. I was able to show this is in a graph (screenshot below) and when you filter by a dept. or supplier the totals reflect the change. 

My issues is when I tried to display the current week total, previous week total and the WoW % percent change (DAX (Current week-Previous week) / Previous week) - by supplier or dept. it returns duplicate totals. I also tried bucketing the 91-180 days and then bringing into a table which is fine, but the totals were still duplicated. Would any one be able to help me with this please? 

Dax I used for the graph: 

Measure =

VAR lastWeekAmount =

    CALCULATE (

        SUM ( Append1[Video Views] ),

        FILTER (

            ALL ( 'Calendar' ),

            'Calendar'[WeekNum]

                = MIN ( 'Calendar'[WeekNum] ) - 1

        )

    )

RETURN

    DIVIDE (SUM (Append1[Video Views] ) - lastWeekAmount, lastWeekAmount, 0 )

Want I would love to see in powerBi, the below is an example (not real totals) of what I would like the table to show in powerBi:

Any help is greatly appreaciated!! 😊

[amitchandak]

@Vari209 , Please use a separate Week/date table and use the week rank

Have these new columns in Date Table, Week Rank is Important in Date/Week Table
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)

Have these new columns in Date Table, Week Rank is Important in Date/Week Table

Week Rank = RANKX('Date','Date'[Week Start date],,ASC,Dense)
OR
Week Rank = RANKX('Date','Date'[Year Week],,ASC,Dense) //YYYYWW format

These measures can help
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

Time Intelligence, Part of learn Power BI https://youtu.be/cN8AO3_vmlY?t=27510
Time Intelligence, DATESMTD, DATESQTD, DATESYTD, Week On Week, Week Till Date, Custom Period on Period,
Custom Period till date: https://youtu.be/aU2aKbnHuWs&t=145s

[Vari209]

Hi Amitchandak, 

Thank you for the quick reply! I have already been able to create a table with current week, previous week and WoW % change, but thats not what I was looking to do. 

I was able to complete this view previously in the below screenshot, but not what I am looking for. 

I am looking to have a table or Matrix table to view the following in Power Bi. When I try to list the supplier it duplicates values. Want I would love to see in powerBi, the below is an example (not real totals) of what I would like the table to show in powerBi: 

Looking forward to hearing back from you! 🙂