Mysql 对联接表而不是实际表使用查询

我现在有一个查询，它非常适合查找玩家信息，包括他们的排名：

SELECT  t1.pid, 
        t1.type, 
        t1.pspeed, 
        t1.distance, 
        t1.maxspeed, 
        t1.prestrafe, 
        t1.strafes, 
        t1.sync, 
        t1.wpn, 
        1+SUM(t2.pid IS NOT NULL) as rank 
FROM    records t1 
        LEFT JOIN records t2
            ON  t1.type = t2.type 
                AND t1.pspeed = t2.pspeed 
                AND t1.distance < t2.distance
WHERE   t1.pid = "'.$pid.'" 
        AND t1.type IN ("type1","type2","type3")
GROUP   BY t1.type, t1.pspeed

我希望使用第二个查询来代替第一个查询中的FROM records部分，但由于使用了许多别名，我在尝试中把自己弄糊涂了

下面是一个令人遗憾的尝试例子：

SELECT  t1.pid, 
        t1.type, 
        t1.pspeed, 
        t1.distance,
        t1.maxspeed, 
        t1.prestrafe, 
        t1.strafes, 
        t1.sync, 
        t1.wpn, 
        1+SUM(t2.pid IS NOT NULL) as rank
FROM    (
            SELECT  * 
            FROM    records 
                    JOIN players ON records.pid=players.id
        ) t3 t1
        LEFT JOIN records t2
            ON  t1.type = t2.type 
                AND t1.pspeed = t2.pspeed 
                AND t1.distance < t2.distance
WHERE   t1.authid = "'.$authid.'" 
        AND t1.type IN ("type1","type2","type3")
GROUP   BY t1.type, t1.pspeed

---

任何能鞭策我的人请随意这样做。我对SQL仍然很在行。

您的加入看起来非常接近。但是，您给了子查询两个别名。试试看

SELECT t1.pid, t1.type, t1.pspeed, t1.distance, t1.maxspeed, t1.prestrafe, t1.strafes, t1.sync, t1.wpn, 1+SUM(t2.pid IS NOT NULL) as rank
FROM
(
      SELECT players.*, rec.pid, rec.type, rec.pspeed, rec.distance, rec.maxspeed, 
      rec.prestrafe, rec.strafes, rec.sync, rec.wpn 
      FROM records AS rec JOIN players ON rec.pid = players.id  ) AS t1
LEFT OUTER JOIN records t2
ON t1.type = t2.type AND t1.pspeed = t2.pspeed AND t1.distance < t2.distance
WHERE t1.authid = "'.$authid.'" AND 
t1.type IN ("type1","type2","type3")
GROUP BY t1.type, t1.pspeed

---

此外，在子查询中命名列应该可以消除重复列错误。

这行似乎有问题：SELECT*FROM records JOIN players ON records.pid=players.id t3 t1发布您收到的错误消息。这让我很害怕：其中t1.pid='.$pid'。它说您正在构建的查询极易受到sql注入攻击：我得到了一个重复的列名id错误。这就是我尝试使用两个别名的原因。记录是否有ID列？有两个ID列通过，查询引擎无法识别哪个是哪个。必须为其中一个设置别名，或将其从“选择列”列表中删除。

SELECT t1.pid, t1.type, t1.pspeed, t1.distance, t1.maxspeed, t1.prestrafe, t1.strafes, t1.sync, t1.wpn, 1+SUM(t2.pid IS NOT NULL) as rank
FROM
(
      SELECT players.*, rec.pid, rec.type, rec.pspeed, rec.distance, rec.maxspeed, 
      rec.prestrafe, rec.strafes, rec.sync, rec.wpn 
      FROM records AS rec JOIN players ON rec.pid = players.id  ) AS t1
LEFT OUTER JOIN records t2
ON t1.type = t2.type AND t1.pspeed = t2.pspeed AND t1.distance < t2.distance
WHERE t1.authid = "'.$authid.'" AND 
t1.type IN ("type1","type2","type3")
GROUP BY t1.type, t1.pspeed