Top quality users in last six months
Top 20 users by average post score.
Post scores are calculated based on reply count, likes, incoming links, bookmarks, average time (reading?) and read count.
SELECT
sum(p.score) / count(p) as "average score per post",
count(p.id) as post_count,
p.user_id
FROM posts p
JOIN users u ON u.id = p.user_id
WHERE p.created_at >= CURRENT_DATE - INTERVAL '6 month'
AND NOT u.admin
AND NOT u.silenced
AND u.active
GROUP by user_id, u.views
HAVING count(p.id) > 50
ORDER BY sum(p.score) / count(p) DESC
LIMIT 20