Calcuate Weekly difference and create a table

[ckhoo2007]

Hi,

I am new to Power BI, I have the following data:

I would like to create a table calculating the % difference on weekly basis for sales per client, something like below:

Appreciate your help how to create the Measure, many thanks.

br,

Choo

[amitchandak]

@ckhoo2007 , with a date table and Week rank you can do that

Examples

new columns
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)
Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)
OR
Week Rank = RANKX(all('Date'),'Date'[Year Week],,ASC,Dense) //YYYYWW format

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

Diff % = divide([This week] -[Last Week], [Last Week])

refer my blogs for more details

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

[ckhoo2007 · Accepted solution]

Thanks Amit.

But I already have week number in the table, can't I just sum up e.g. for the same client and same week then divide by the sum of previous week?

[ckhoo2007]

Hi Amit,

I tried to create the measures and they worked, thanks.

Br,

Choo