I am getting Data Analysis Expressions ("DAX") vibes. Feels like what it tries to do is similar to the DAX language used by PowerBi and Analysis Services for Di

I am getting Data Analysis Expressions ("DAX") vibes. Feels like what it tries to do is similar to the DAX language used by PowerBi and Analysis Services for Direct Query but expressed differently I am honestly having a hard time reading their examples versus DAX. Something missing that DAX has is a selected values feature. I imagine looker might have something similar?