mysql - 多个最高记录mysql

Question

有两行的最高值为 5，但下面的查询只返回最后一个最高记录......我怎样才能获得成员值最高的所有行？

我可以使用 max is where 子句请帮忙吗？

SELECT teamcode,MAX(member) AS members FROM(
    SELECT t.`teamcode` AS teamcode,
    COUNT(*) AS member
    FROM `users` u
    JOIN teams t
    ON u.teamcode=t.tm_id
    GROUP BY `teamcode`
) AS maxcount

如何获得所有最高值？

Answer 1

您可能会更好地从 WHERE 子句中获取具有最大值的行，例如：
WHERE member = MAX(member)
而不是尝试在 SELECT 子句中执行此操作。

编辑：我在这里扩展了我对 SQL 的了解，但试试这个：
SELECT teamcode, member
FROM(
SELECT t.'teamcode' AS teamcode, COUNT(*) AS member
FROM 'users' u JOIN teams t ON u.teamcode = t.tm_id
GROUP BY 'teamcode'
HAVING member = MAX(member)
) AS maxcount

Answer 2

首先，因为您只想使用团队代码进行计数：您不需要使用JOIN! 但是，您确实需要一个辅助表。

  SELECT teamcode,
         COUNT(*) as members
    FROM users
GROUP BY teamcode
  HAVING COUNT(*) = (   SELECT COUNT(*)
                          FROM users
                      GROUP BY teamcode
                      ORDER BY COUNT(*) DESC
                         LIMIT 1             );

SQL-Fiddle，如果你愿意的话。

使用过的参考资料： SQL Query of Using Functions - How to get MAXIMUM Count of the list

Answer 3

如果您不仅想要查询中的最大值，最好使用 GROUP BY。

SELECT teamcode,MAX(member) AS members FROM(
    SELECT t.`teamcode` AS teamcode,
    COUNT(*) AS member
    FROM `users` u
    JOIN teams t
    ON u.teamcode=t.tm_id
    GROUP BY `teamcode`
) AS maxcount
GROUP BY teamcode

如果你想要五个最高值中的两个，你应该使用子句“LIMIT”。