Substraction in M language

[Anonymous]

Hello,

How can I write calculation in M query to SUBSTRACT two column values along with IF and SUM combination?

I know using DAX but I want to write in M language. Can you please suggest. Below is simple example which I am trying to acheive using M language

EX:

Final Formula = (if A= "Y" then sum (B) Else null) - (if C= "Y" then sum (D) Else null) 

Thank you

[Stachu · Accepted solution]

I'm guessing the formula will add a new colum, please remember that it's evaluated per row so there is no SUM as such
code would look like this

(if Text.Upper([A])= "Y" then [B] else 0) - (if Text.Upper([C])= "Y" then [D] else 0)

I replaced null with 0s because in M

null + 2 = null

you could add another if to replace 0 with null when necessary

I also added Text.Upper cause M is case sensitive when making comparisons

[v-frfei-msft]

Hi @Anonymous,

Does that make sense? If so, kindly mark the answer as solution to close the case.

Regards,
Frank