Q&A for professional and enthusiast programmers
SELECT users.id, users.name, users.scoreSum FROM (SELECT a.OwnerUserId AS id, u.DisplayName AS name, SUM(a.Score) AS scoreSum FROM Tags t INNER JOIN PostTags AS pt ON t.Id=pt.TagId INNER JOIN Posts AS q ON pt.PostId=q.Id INNER JOIN Posts AS a ON q.Id=a.ParentId INNER JOIN Users AS u ON a.OwnerUserId=u.Id WHERE t.TagName LIKE '##tag##' GROUP BY a.OwnerUserId, u.DisplayName ) AS users WHERE users.scoreSum >= 5 ORDER BY users.scoreSum DESC;