Power BI - Prior Month Values and % Change for a existing measure which aggregates from daily to monthly
I have a table with daily observations. I have an existing measure (Total_Visits_Sum) that provides the data on a monthly or quarterly basis based on the date I use for the axis. If I use a custom column in the calendar for MMM-YY the data automatically gets aggregated.
SUMMARIZE (
'Data',
'Data'[Date]),
CALCULATE (
SUM ( 'Data'[Visits])))
My question is how do I get the prior month's value to compare, so I could do a month-over-month change? I have seen the examples that do this but only when the underlying frequency of the data is monthly, not aggregated like I am doing.
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