MYSQL - 查找不同的記錄並按其他字段排序

Question

首先，感謝大家花時間幫助解決我的問題。

我有包括id和content

一個例子組數據表：

id content 
9 With astonishing insight and poignant precision 
8 Whether they find themselves hacking rattles from the tails of snakes or nesting rattles in the hands of their babies. 
4 This is a clear-eyed, deeply poignant collection. 
12 This book is a dynamic compilation of snapshot tales, each of which encompasses its own sensory-rich world and can be read. 
12 This book is an appropriate title for her collection-the prose poems feel revealed. 
12 This book is a collection of ekphrastic vignettes set against surreal backdrops fraught with eerie characters faking normalcy. 

我需要做的就是找到最短長度content爲每一個獨特id

例如，上面的輸出應該是：

id content 
9 With astonishing insight and poignant precision 
8 Whether they find themselves hacking rattles from the tails of snakes or nesting rattles in the hands of their babies. 
4 This is a clear-eyed, deeply poignant collection. 
12 This book is an appropriate title for her collection-the prose poems feel revealed. 

我有什麼，到目前爲止，顯然是錯誤的是：

SELECT DISTINCT id, content FROM t 
    GROUP BY id; 

謝謝您的幫助！

Answer 1

一種方法是計算最短長度，然後加入結果回：

select t.id, t.content 
from (select id, min(length(content)) as minl 
     from t 
     group by id 
    ) tmin join 
    t 
    on t.id = tmin.id and length(t.content) = tmin.minl; 

注意：如果兩個內容具有相同的長度，並且是最小的，這將返回他們兩個。你的問題沒有具體說明在這種情況下要做什麼。