How to connect several tables to one layer

[Alex3]

How can I connect several tables to one layer like this: 

I don`t want to include the information from the different tables directly in the attribut table, just links like above. 

All tables have a field to join. 

[GaryMorris · Accepted solution]

If the layers intersect you can write an Arcade script to pull a field from an intersecting layer to display in the pop-up.

[GaryMorris]

Here is an article and older community post that might help"

Access attributes from another layer with ArcGIS Arcade | Learn ArcGIS

Solved: Using Arcade in Popup to display fields from 2 dif... - Esri Community

[MikeMinami]

What the table is showing in your figure is a related table. To create related tables, you need to use ArcGIS Pro, then publish from Pro to ArcGIS Online. The ArcGIS Online website doesn't allow you to define relationships through the user experience currently. Here's a Pro help topic that explains related tables.

Note that the table in Map Viewer doesn't currently support showing related tables. This is something we're working on and will support in a future release. However, both Map Viewer Classic and the item's Data tab both support showing the related tables.

Mike