ArcGIS Online Arcade - groupBy

[KrzysztofJalocha]

Hi all,

I have two layers in hosted feature layers - counties and voivodeships

In counties layer I have a field "aggrement" (integer type) where users will type sum of aggrements signed in this county (I need  it in my company)

Is it possible to create a field in voivodeships layer where I can sum aggrements signed in each county which is located wihtin voivodeships? 

Something like dissolve and sum or grouped, but I'd like to have dynamically it on AGOL

[jcarlson]

Do the two layers align? Is it possible to have a "county" field in the voivodeships layer? An attribute-based join can be dynamic, but a spatial join cannot.

[KrzysztofJalocha]

thank you @jcarlson . They are aling. I have field like this. See attachment please.

So for "TERYT" =24  the SUM should be 2 (I typed it manually for now)