如何通過聚合函數過濾MySQL SELECT？

Question

SELECT h11, HA11 
FROM florin.h11 
WHERE (3>d1 AND 3<d2) OR (3>d1 AND 3=d2 AND id=MAX(id)) 
UNION (3=d1 AND 3<d2 AND id=MIN(id)); 

這裏我表stucture的截圖：

Answer 1

一是錯誤的事情是

• 請註明如果林是數據庫和H11的表。

如果林是表，然後只寫「選擇H11，HA11從林」，不寫列名。

二錯誤的事情是

• 聯盟運算符用於連接兩個查詢的結果。欲瞭解更多信息衝浪www.w3school.com

所以，火查詢像

select h11, HA11 
from florin 
where (3 > d1 and 3 < d2) or (3 > d1 and 3 = d2 and id = MAX(id)) 

union 

select h11, HA11 
from florin 
where (3 = d1 and 3 < d2 and id = MIN(id)) 

這裏可以此查詢不返回預期的結果，但是這是我的想象，你想這種類型的查詢。

Answer 2

我想你會喜歡做的是這樣的：

SELECT h11, HA11 
FROM florin.h11 
WHERE (3>d1 AND 3<d2) 
    OR (3>d1 AND 3=d2 AND id = (SELECT MAX(t2.id) 
           FROM florin.h11 AS t2)) 
    OR (3=d1 AND 3<d2 AND id = (SELECT MIN(t3.id) 
           FROM florin.h11 AS t3));