Map Services and Joins.

[jaykapalczynski]

I have access to a basic Map Service.  I also have a dataset/table with a bunch of additional information. 

1. Can I join this Map Service with the table, register it in AGO and use it in a AGO template?
2. In JavaScript API.  Can I do this join and then have the data available in my JS App?

[JakeSkinner]

Hi Jay,

You will not be able to perform the join to the map service.  You will need to perform the join to the actual data.  Here is a tool you can use to download the data from the Map Service.  Once it's downloaded, you can then join the table to feature class, and then re-publish as a new map service.

[jaykapalczynski]

Thats what I was figuring....

Question...Can I use this tool for any map service out there....especially one that is not in AGO but on someones own server....I have credentials to view it...can I download it?

[jaykapalczynski]

What about the link below

JoinDataSource | API Reference | ArcGIS API for JavaScript

[FionaRenton1]

I found a sample on github, but it looks like it connects to a File geodatabase.

I don't know how you can relate two map services even if one is a table.

https://github.com/Esri/developer-support/blob/master/web-js/join-data-source/JoinDataSource_Final.h...