Created a topic in a specific category with conditions

Data & reporting
1

I tried this for users who have created a new Topic in a specific Category that satisfied some conditions.

SELECT DISTINCT ON (p.user_id) p.user_id, p.id post_id, p.created_at granted_at
FROM posts p
INNER JOIN topics t
ON p.topic_id=t.id
WHERE t.category_id = 99 AND p.post_number=1 AND  <conditions here> AND
  (:backfill OR p.id IN (:post_ids) )