Q&A for network engineers
select parent.id as [Post Link] from comments join (select p.id from posts p inner join users u on (p.ownerUserId=u.id) and (DATEDIFF(d, u.CreationDate, p.CreationDate) < 3) where p.postTypeId = 1) parent ON parent.id = comments.postId and comments.userId=##UserId##;