Hi,
I have a simple excel sheet with 2 columns(Month, Sales) with sales related data for 4 months.
And all i am trying to do is create a new colum which gives me last month's sales using a DAX function against each month.
I have tried measures with following calculations
Measure_TotalSales = SUM('Sheet1 (2)'[sales])
Measure_PrevMonthSales = CALCULATE([Measure_TotalSales],dateadd('Sheet1 (2)'[Month],-1,MONTH))
Measure_PrevMonnth_PREVIOUSMONTH = CALCULATE(SUM('Sheet1 (2)'[sales]),PREVIOUSMONTH('Sheet1 (2)'[Month]))
I have tried to create a calculated column with following calculations
Column_PrevMonthSales = CALCULATE([Measure_TotalSales],dateadd('Sheet1 (2)'[Month],-1,MONTH))
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on top of that i have also tried
http://www.dutchdatadude.com/power-bi-pro-tip-making-date-time-calculations-work-time-intelligence/
and downloded files from Web and copied formulas as specified in the following link
http://powerbi.tips/2016/07/measures-month-to-month-percent-change/
followed step by step as specified the teh link above, but i still see blank rows for the prev month calc.
Could this be a bug or do i need to use a different version of PBI desktop?