No, as you will see from this screenshot https://tinyurl.com/ylushwlc
Even though I deleted the sub-site, the database tables are still there and that’s why I submitted this ticket because for the sake of performance, when we delete a sub-site, the database entries and tables should be deleted as well to leave place for other sub-sites, plugins etc.
Otherwise, if we delete 2-3 sub-sites but don’t care about the database, at some point, we end up having 2-3 database tables left over.