Hi Kathryn!
Thanks for reaching out to us and for your interest in Community Events.
All the events generated by our plugins are a ‘tribe_events’ custom post type, so you should be able to access them like any other regular post type for a WordPress site, in the wp_posts table.
I’m not familiar with Tableau and not exactly sure about the implementation you need to accomplish with it. But, let also point you to the following article that explains how you can create cutom queries for our events using the tribe_get_events function > https://theeventscalendar.com/knowledgebase/using-tribe_get_events/
I hope that helps. Let me know if any follow up questions.
Best,
Victor