Forum Discussion
Comparing daily counts year over year
Hello-
I am new to Power BI and I have been tasked to create a dashboard where I am comparing traffic counts by day between last year and this year to show the impact of COVID-19. I would like to do this in a stacked bar chart, but I cannot get it to work. The data is an excel dump from an SQL database (I'm working remotely so I can't access the database itself) in the form of monthly files. I've appended these into both yearly queries and a single query with all the data from both years. What is the best way to approach this? Thanks!
Mike
Hi mikegee78 ,
You may create a calendar table first, then create relationship with your fact data table on date field.
Calendar=CALENDARAUTOThen create measure like DAX below.
Current year count=SUM(Table[Traffic count]) Last year count= CALCULATE(SUM(Table[Traffic count]),DATEADD(Calendar[Date],-1,Year))Best Regards,
Amy
Community Support Team _ Amy
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
4 Replies
- amitchandak
Super User
mikegee78 , You can create a year behind the measure
example
Year behind Sales = CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],-1,Year))
Or Same weekday last year
Week Year behind Sales = CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],-364,DAY))
and can compare with your date
- Mariusz
Community Champion
Hi mikegee78
You can use SAMEPERIODLASTYEAR DAX function please see the link below.
https://docs.microsoft.com/en-us/dax/sameperiodlastyear-function-daxBest Regards,
Mariusz
If this post helps, then please consider Accepting it as the solution.
Please feel free to connect with me.
LinkedIn - DataZoe
Microsoft Employee
You could create a measure for
[Traffic] = sum(Traffic[Traffic Counts])and
[Traffic Last Year] = calculate([Traffic],dateadd(Traffic[Date],-1,year))Make sure that [Date] is a date or date/time column (or from a calendar table that's marked as a date table).
v-xicaiCommunity Support
Hi mikegee78 ,
You may create a calendar table first, then create relationship with your fact data table on date field.
Calendar=CALENDARAUTOThen create measure like DAX below.
Current year count=SUM(Table[Traffic count]) Last year count= CALCULATE(SUM(Table[Traffic count]),DATEADD(Calendar[Date],-1,Year))Best Regards,
Amy
Community Support Team _ Amy
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
