Help Dax

[Glory1891]

Hi everyone,

In Power Bi I created 3 pie charts.
The 1st contains data from 2018, the 2nd data from 2019 and the 3rd the data from 2018 and 2019 combined.
I would like to calculate the difference between 2018 - 2019 using a 4th pie chart.

I have created 2 tables, the first table with the data from 2018 and the 3rd table from 2019.

ChatGpt says that I should use formula: 'Difference 2018-2019 = SUM(YourTable[Revenue 2018]) - SUM(YourTable[Revenue 2019])'.

Unfortunately, I get the following error: Cannot find the table Difference2018-2019=SUM(2018[revenue2018])-SUM(2019[revenue2019]).

The titles of my columns are 2018 and 2019, But unfortunately I'm doing something wrong.

Can someone help me please? 

[Anonymous · Accepted solution]

Hi @Glory1891 ,

Below is my 2019 table:

Below is my 2018 table:

First , you need to configure the relationship for the two tables:

The following DAX might work for you:

Measure = 
   var p_2018 = SELECTEDVALUE('2018'[Som value])
   var p_2019 = SELECTEDVALUE('2019'[Som value])
   var result = 
       CALCULATE(
         p_2019 - p_2018,
         ALL('2018'[Product])
       )
    return result

The final output is shown in the following figure:

Best Regards,

Xianda Tang

If this post helps , then please consider Accept it as the solution to help the other members find it more quickly.

[speedramps]

We want to help you but your description is too vaugue. Please write it again clearly.

Please DON'T copy & paste your dax and reports that does not work and expect us to fathom what you want to do. That is a bit crazy. 😀

Please just give a simple non technical functional decscription of what you want, then let us suggest the solution. Thank you.

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