Forum Discussion
Rolling 4 weeks calculation
Hi, I am calculating Rolling 4 weeks data based on below W1=W1 W2=W1+W2 W3=W1+W2+W3 W4=W1+W2+W3+W4 W5=W2+W3+W4+W5(Starting from W2) ..... W1 is 01-Jan-2020 to 07-Jan-2020 W2 is 08-Jan-2020 ...
Anonymous , refer my blog for week
Columns in Date Table
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)
Week Number = WEEKNUM([Date],2)
Week = if('Date'[Week Number]<10,'Date'[Year]*10 & 'Date'[Week Number],'Date'[Year]&'Date'[Week Number])
Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)
Week name = [Week Start date] & " to "& [Week End date]
Weekday = WEEKDAY([Date],2)
WeekDay Name = FORMAT([Date],"ddd")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))
rolling 4 week Sales = CALCULATE(SUM(Sales[Net Sales]),FILTER(all('Date'),'Date'[Week Rank]>=min('Date'[Week Rank])-4 && 'Date'[Week Rank]<=max('Date'[Week Rank])))
Last 4 period Sales =
Var _min = maxx(allselected('Date','Date'[Week Rank]) -4
Var _max = maxx(allselected('Date','Date'[Week Rank])
CALCULATE(SUM(Sales[Net Sales]),FILTER(all('Date'),'Date'[Week Rank]>=_min && 'Date'[Week Rank]<=_max))
To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions
https://www.archerpoint.com/blog/Posts/creating-date-table-power-bi
https://www.sqlbi.com/articles/creating-a-simple-date-table-in-dax/
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