從子查詢組中選擇最大值

Question

是否可以選擇子查詢的最大值。 我嘗試了以下SELECT MAX（SELECT COUNT（lid）AS count FROM Lessons GROUP BY day），但它顯然失敗了。 有什么建議么？

Answer 1

為什么不呢

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

我相信這就是你要找的東西。