Highest average entries per day for the last 7 days for all entries
select ttrss_feeds.title as feed, count(ttrss_user_entries.ref_id)/7 as postsperday from ttrss_feeds, ttrss_user_entries, ttrss_entries where ttrss_feeds.id = ttrss_user_entries.feed_id and ttrss_user_entries.ref_id = ttrss_entries.