从子查询组中选择最大值

Question

是否可以选择子查询的最大值。我尝试了以下SELECT MAX（SELECT COUNT（lid）AS count FROM Lessons GROUP BY day），但它显然失败了。有什么建议吗？

Answer 1

为什么不

SELECT COUNT(lid) AS count 
FROM Lessons 
GROUP BY day
ORDER BY count desc
limit 1

Answer 2

SELECT MAX(myCount) FROM (SELECT COUNT(lid) AS myCount FROM Lessons GROUP BY day) AS sub Query

我相信这就是你要找的东西。