题目链接：点击打开链接
题目大意：略。
解题思路：略。
AC 代码
WITH t1 AS(SELECT host_team team_id, SUM(IF(host_goals = guest_goals, 1, IF(host_goals > guest_goals, 3, 0))) points
FROM Matches
GROUP BY host_team
UNION ALL
SELECT guest_team team_id, SUM(IF(host_goals = guest_goals, 1, IF(host_goals < guest_goals, 3, 0))) points
FROM Matches
GROUP BY guest_team)
SELECT t.team_id, team_name, SUM(IFNULL(points, 0)) num_points
FROM t1 RIGHT JOIN Teams t ON t.team_id = t1.team_id
GROUP BY team_id
ORDER BY num_points DESC, team_id
