mysql - MySQL中如何对子查询求和

Question

我有以下完美运行的 MySQL 语句。不过，我现在需要如下粗体方括号/圆括号中指定的总数。

SELECT f.fid, r.tid, r.tbd, r.tbc, r.tc, r.tname, r.category,
      SUM(`time`) AS `totaltime`,
      SUM(`points`) AS `points`,
      (SELECT IFNULL(SUM(points),0) FROM Primes WHERE zid = r.zid AND wid = r.wid AND s_id = 38) AS `cl`,
      (SELECT IFNULL(SUM(points),0) FROM Primes WHERE zid = r.zid AND wid = r.wid AND s_id = 34) AS `sp`,

      **[sum points + climb + sprint] AS pointstotal**

      FROM teams f
      JOIN results r
      ON f.wid = r.wid
      WHERE r.rank <= 3 AND r.id = '254293' AND r.category = 'C'
      AND r.fin = '1'
      GROUP BY f.fid
      ORDER BY pointstotal DESC

我尝试了许多不同的排列等以及其他问题中的多个引用，但我就是无法让它发挥作用。

Answer 1

最简单的方法是将查询移动到子查询中，然后添加这些列。

SELECT fid, tid, tbd, tbc, tc, tname, category, totaltime, 
        points, cl, sp, points + cl + sp AS pointstotal
FROM (
    SELECT f.fid, r.tid, r.tbd, r.tbc, r.tc, r.tname, r.category,
          SUM(`time`) AS `totaltime`,
          SUM(`points`) AS `points`,
          (SELECT SUM(points) FROM Primes WHERE zid = r.zid AND wid = r.wid AND s_id = 38) AS `cl`,
          (SELECT SUM(points) FROM Primes WHERE zid = r.zid AND wid = r.wid AND s_id = 34) AS `sp`
    FROM teams f
    JOIN results r
    ON f.wid = r.wid
    WHERE r.rank <= 3 AND r.id = '254293' AND r.category = 'C'
    AND r.fin = '1'
    GROUP BY f.fid
) AS x
ORDER BY pointstotal DESC

但我通常不喜欢相关子查询，我更喜欢连接，然后你就不需要另一个级别了

SELECT SELECT f.fid, r.tid, r.tbd, r.tbc, r.tc, r.tname, r.category,
        SUM(time) AS totaltime, SUM(points) AS points,
        cl, sp, SUM(POINTS) + cl + sp AS totalpoints
FROM teams AS f
JOIN results AS r ON f.wid = r.wid
JOIN (
    SELECT zid, wid, SUM(IF(s_id = 38, points, 0)) AS cl, SUM(IF(s_id = 34, points, 0)) AS sp
    FROM Primes
    GROUP BY zid, wid
) AS p ON p.zid = r.zid AND p.wid = r.wid
WHERE r.rank <= 3 AND r.id = '24293' AND r.category = 'C' AND r.fin = '1'
GROUP BY f.fid
ORDER BY pointstotal DESC