I understand this is a very old forum post. But it still gets a lot of clicks and deserves an answer.
Yes, you can do this in Redash using the Query Results Data Source. The typical caveats about Redash performance apply. So if you need to join 100k+ rows of data across multiple BigQuery instances, you should use a proper data warehouse or ETL solution (and connect Redash to that!).
In many cases, however, the query results data source provides an adequate means of linking together data from multiple sources.
2 Likes
Login or sign up disabled while the site is in read only mode