Comparison- current month vs previous month

[CTan42]

excel filepower bi datamatrix

I want to create a comparison matrix. Using the current month revenue minus previous month revenue. Is there anyway to do this?

[Anonymous · Accepted solution]

Sure there is a way! 🙂

You can use DAX to creat the appropriate measures to show in your matrix. See some example here: https://powerbi.tips/2016/07/measures-month-to-month-percent-change/.

But first you need to make sure the Date column is of Date data type - you need this in order to use Time Intelligence functions in DAX and to allow Power BI to deal with time hierarchy.

Hope that helps.

Cheers,

Pawel

[Anonymous · Accepted solution]

OK, try out this .pbix file and see if the approach used inside fits your need: http://blog.sqlgeek.pl/Download/DAX - Month over Month.pbix.

I used the same DAX function mentioned in the article (PREVIOUSMONTH). And presence of the regions in your data doesn't change much.

Cheers,

Pawel

[Anonymous]

Hi,

I tried the same with data set i have, and its not working. Could you help me out here if possible?? Have attached the link to PBIX Download

Thanks

PBIX File 

[DavidB]

Hello @Anonymous

Thank you for your contribution to this topic.

I am looking for same type of comparison, but just with current weeknum vs. previous weeknum.
I have tried Google, and there does not seem to be a PREVIOUSWEEK function like there is a PREVIOUSMONTH function you refer to.

How would you go about comparing week numbers?

Best regards
David

[steph_io]

I've found that creating a date table with every required breakdown of the date (ie: Month number, Week number) is a good practice. This numbering should just be a sequential number from the begining of your date range of the date table to the most recent date. That way you can use simple DAX like: Lead PM = CALCULATE([Leads], FILTER(ALL(CreateDateTable), CreateDateTable[MonthNumber]= MAX(CreateDateTable[MonthNumber])-1).  If the MonthNumber is a running number from 1 to 36 for a 3 yr period, then you don't won't have an issue considering the year.  Same can apply to Week number.

This article was helpful:  http://www.daxpatterns.com/time-patterns/

[Mike_Carlo]

Here are some tutorials on generating a date calendar with an Index for months, Years, Days, and weeks.  This uses the same logic as @steph_io  Great solution.

https://powerbi.tips/2017/11/creating-a-dax-calendar/

https://powerbi.tips/2017/12/start-of-month-dax-calendar/

[Anonymous · Accepted solution]

Sure there is a way! 🙂

You can use DAX to creat the appropriate measures to show in your matrix. See some example here: https://powerbi.tips/2016/07/measures-month-to-month-percent-change/.

But first you need to make sure the Date column is of Date data type - you need this in order to use Time Intelligence functions in DAX and to allow Power BI to deal with time hierarchy.

Hope that helps.

Cheers,

Pawel

[CTan42]

@Anonymous hi, i have a another question. I have more 10tables like this. However, I tried to create same measures in every single table. However, it doesn't allow me to use the same name of the measure (i have to use the same name in order for presentation). Is it possible to create only one measures in one table only and it will work for every tables? 

Thanks.

[CTan42]

@Anonymous basically what i'm trying to say is there any other ways that can i copy and paste all of the existing measure into another table with the same name but slightly different formula. 

thanks.

[CTan42]

thx for the suggestion...but it doesn't work on my data...as u can see i have repeated region in every month...it is the difference between my data n your data

[Anonymous · Accepted solution]

OK, try out this .pbix file and see if the approach used inside fits your need: http://blog.sqlgeek.pl/Download/DAX - Month over Month.pbix.

I used the same DAX function mentioned in the article (PREVIOUSMONTH). And presence of the regions in your data doesn't change much.

Cheers,

Pawel

[CTan42]

@Anonymous

Thanks....It works...I have another question as well...how about if i wanna compare current month with last year month. Is there anyway to do that. I had tried the similar step.

Belows are the measurea:

Revenue LYM = CALCULATE([Revenue CM],PREVIOUSYEAR(Data[Date]))

Revenue CMvLLYM = [Revenue CM]-[Revenue LYM]

However it doesn't work. Can you see the problem?

[Anonymous · Accepted solution]

Instead of PREVIOUSYEAR use SAMEPERIODLASTYEAR function.

[steph_io]

How do we have these formulas fetch the prevous month, that falls before the filtered date range (ie: date slicer)?