Executing a SQL server query in power BI

I need to execute a sql server query in power bi. I know this isn't how it is generally done and PBI recommends writing queries in M query, my hand is kind of forced in this. 

I have an expression. let's assume it is "Month(GetDate())" . I need Power BI to take that sql query and execute it. 

If i load this in "edit queries" I just get :

let
    Source = "Month(GetDate())"
in
    Source

However, I would like PBI to execute it and give me the current month.

I atleast need to know that this isn't possible with power BI in any way.

Thanks in advance!