Forum Discussion
Weekday Last Year Comparison
Hi everybody !
I have a requeriment that i don't know how to achieve. Question is simple, how can I compare this year sales with exactly the same weekday sales of last year. take for instance, Today is July 1st 2016 i must compare today sales with sales on 29th June 2015 because this two days are monday of the same week.
You can think that's piece of cake, just DATEADD -365 days or DATEADD -1 year but I have to say there are some years that doesn't have 365days. For instance, this febrary have 29 days and febrary of last year have just 28, aka leap-year.
I think this could resolve my problem but actually dax doesn't accept 'week' as parameter
Ventas cliente preferente YTD:=CALCULATE(
[Ventas cliente preferente]
, DATEADD(Tiempo[Fecha],-52,week)
)I hope you can help me
Thanks in advance
20 Replies
the dax maybe was:
Calendar[Date] - 364
Hi Vvelarde, yep you're right it was 3th July 2015 I confused it with August.
About your answer, It work for this year, but what happen if the year is a leap-year? It has 366 days and a normal year has 365. It have to be dynamic or something like that. My solution have to work to infinity and beyond
One solution that came to mind is on the date (calendar) table
1. create a column WeekNo= Weeknum([Calendar[FullDate]) ( Full Date is the Date column in DD/MM/YYYY format)
2. Create a column WeekDayNo = WeekDay(Calendar([FullDate])
3. Create a column Year = Year(Calendar[FullDate])
4. Create a column DWY = ([WeekDayNo]*100+[WeekNo])*10000+[Year] . This will create numbers like 5012015, 5012016, etc. etc
depending on the Date.
5. Join your fact table to the Calendar table
6. Create a measure sya for Sales = sum(Facttable[SalesAmount])
7. Create a measure to compute the sales for same day same week last year as
SalesLYDWY = Calculate([Sales], Filter(ALL(Calendar),Calendar[DWY] = Max( Calendar[DWY]) -1 ))
8. You should now be able to view the Sales and SalesLYDWY side by side.
Sample of what I did
Column Labels 1 2 3 4 5 6 7 Row Labels Sales2 SWLY Sales2 SWLY Sales2 SWLY Sales2 SWLY Sales2 SWLY Sales2 SWLY Sales2 SWLY 2015 24 41 43 25 45 47 49 51 53 55 57 26 59 61 63 65 67 69 71 27 73 2015 Total 177 108 112 116 120 165 171 2016 24 41 43 25 41 45 43 47 45 49 47 51 49 53 51 55 53 57 26 55 59 57 61 59 63 61 65 63 67 65 69 67 71 27 69 73 71 73 2016 Total 165 171 177 108 112 116 120 This should work for all years and weeks for eternity.
If this solves your requirement please accept this as a solution and also give KUDOS.
Cheers
CheenuSing
Dear Anonymous,
Thank you, this is great.
The only challenge I have is that my last year based on your number. 7 has one drawback.
Net Sales LY test = CALCULATE([Net Sales test];FILTER(ALL('TestDWH Date');'TestDWH Date'[DWY] = MAX('TestDWH Date'[DWY])-1))
When I have it on days, i.e. monday, tuesday etc, my "total" row in f.ex. a table only show value for sunday LY. Do I need any IF statement?
Thank you,
Mikkel
Hi
A leep year still has 52 weeks so you will hit the same weekday.
But in years with 53 weeks you have to decide whether you want to go 364 days (52*7) back or (53*7) - the easy way is always to use 364 (52*7) :-)
br
Erik
Hi,
I want to know if your Tiempo[Fecha] is continuous date or not.
If it’s continuous date you can create a measure like below:
Measure yourMeasure = CALCULATE(SUM('Tiempo'[yourColumn]),SAMEPERIODLASTYEAR('Tiempo'[Fecha]))
When you use filter on this measure, remember to remove date hierarchy, just use date.
On the other way, if your Tiempo[Fecha] is not continuous date, there is not way to come to that result you want.
Best Regards
Alex
Hello!
I can see that donsvensen & Vvelarde suggested easy approach and it seems to work in my report. Many thanks!
My measure isSales LYSD = CALCULATE([BIG PROFIT],DATEADD('Calendar'[Date],-364,DAY))YOUR DATE LIKE THIS TABLE:
create weeknum and year colnum
and
SUMMARIZE(weeknum,year,"total sales", sum(sales))last year = lookupvalue([total sales],[weeknum],[weeknum],[year],[year]-1)
AND question about your weeknum.
It is depends on how you want to read your week.
You week is from Monday to Sunday.
if you feel the week number may be some problem.
You can try make 01/01 - 01/07 of each year to week number 1, and 08 - 14 to week number 2.
weeknum = int(([date] - DATE(year([date],1,1)+1)/7)
