Question

我试图将返回多行的select的结果相加：我有四个表（用户，团队，飞行员，结果）：

user (id_user)
team (id_user, id_team)
pilot (id_pilot, id_team)
result (id_pilot, id_gp, points)

当我这样做时：

SELECT p.id_team, SUM( r.points ) AS TOTAL
FROM pilot p
LEFT JOIN result r ON p.id_pilot = r.id_pilot
WHERE r.id_grand_prix =  '1'
GROUP BY p.id_team

我得到：

id_team TOTAL
-------------
1 10
2 15
3 5
4 6
5 7

我想要的是，如果id_user有id_team 1和2有25分。

我试试：

UPDATE user AS u 
JOIN has_team ON u.id_user = has_team.id_user 
JOIN (
    SELECT p.id_team, SUM( r.position ) AS TOTAL
    FROM pilot p
    LEFT JOIN result r ON p.id_pilot = r.id_pilot
    WHERE r.id_grand_prix =  '1'
    GROUP BY p.id_team
    ) AS grp 
  ON grp.id_team = has_team.id_team
SET u.points = grp.TOTAL + u.points

但我只有一支球队的分数。

事先非常多可以帮助我。

Answer 1

您是否希望获得每个用户而非每个团队的积分总和？

如果是这样，您的查询可能是这样的：

SELECT u.id_user, SUM( r.points ) AS TOTAL
FROM pilot p
LEFT JOIN result r ON p.id_pilot = r.id_pilot
INNER JOIN team t ON p.id_team = t.id_team
INNER JOIN user u ON t.id_user = u.id_user
WHERE r.id_grand_prix =  '1'
GROUP BY u.id_user

如果没有，你能澄清一下你需要展示什么吗？

求和返回多行的SELECT的结果

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