Can you have multiple datasources in Visual Analytics? If so, how do you get the second on in?
You can connect to multiple data sources in Visual Analytics via the Data > Connect to Data... menu option. This will bring up a list of results from the Query Analyzer windows.
From there you can load in any of the result sets into Visual Analytics. Note that you can't initiate a new connection in Visual Analytics. You must execute the query in Query Analyzer first to obtain the query result, and then connect to the result set from Visual Analytics. See here for more details: https://www.aquaclusters.com/app/home/project/public/aquadatastudio/wikibook/Documentation19/page/Connecting-to-Data/Connecting-to-Data