You can join tables in Visual Analytics, but the recommendation is that you join tables outside of Visual Analytics and then use the joined table in the report. Data joins in Visual Analytics are really meant for data exploration. One of the reasons is that a data source join creates a temporary table every single time someone accesses the report.
Good news: We've extended SAS Hackathon registration until Sept. 12, so you still have time to be part of our biggest event yet – our five-year anniversary!