I have just two tables Sales and Calendar
Sales
Date_of_S Amount
10/1/2019 100$
4/2/2019 60$
5/2/2019 50$
28/2/2019 200$
10/1/2020 75$
1/2/2020 30$
3/2/2020 10$
4/2/2020 45$
5/2/2020 85$
calendar has been genarated with dates between two vars
minD =calculate (min(dates_of_S),all(sales)) -- 10/1/2019
MaxD =calculate (max(dates_of_S),all(sales)) -- 5/2/2020
TotSales= sum(sales.amount)
TotalSalesLY= calculate(TotSales,sameperiodlastyear(calendar.date)) -- calendar is connected many to one with sales and has been declared as a dateTable on the model
* When I see Jan20 compared to Jan19 everything's perfect
*When I see the sales of the period Feb2020 I receive TotSales 170$ (30+10+45+85)and TotSalesLY 310$ which is incorrect (this is the sum of Feb19 includes the sales of 28/2/2019)
* When I use slicer and I select dates up to 4/2/2020 I receive correctly TotSales 85$ (30+10+45) and TotSalesLY correctly 60$
* When I use multiple selection only 1/2/2020 and 5/2/2020 excluded the 4/2/2020 I receive 115$(30+85) and correctly for LY just 50$ (sales on 5/2/2019)
* Crazy!! when I use multiple dates and I choose e.g 1/2 2/2 ___ ___ 5/2 the result is correct
BUT when I use 1/2 __ __ 4/2 & 5/2 the last two dates of February returns the Total of February2019 310$ again ... (I give up)... The symptom meets the situation when you choose the 2 latest days of your sales?!?!?
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I should use eomonth functions to avoid that or hasnofilter IFs.
Another aspect is when I use the sales date TotSalesLY= calculate(TotSales,sameperiodlastyear(sales.date_of_S)) the measure returns blank...
I suspect there is a problem with the connection of my Calendar or something DAX systemic or my ignorance
Thank you in advance
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P.S SALES table derives from two tables appended in PowerQuery e.g Sales2019 into --> Sales
