Hello to anyone who can help.
Our database is has reached the limit of our host and we need to reduce it. It looks like the culprit is the “order_data” table. I read in a forum post that deleting old orders will reduce it, but it doesn’t seem to be changing the size at all. I’ve deleted thousands of orders and no change in the table or database size.
For anyone having similar issue in the future, it turns out I had to “Optimize” the database (option found in the Admin panel) as two people mentioned above, and this seemed to update/reduce the database size accordingly.