SQL - 爲了通過對每個組

Question

我有一個查詢，看起來像這樣：

SELECT 
    USER .id, 
    listing.country, 
    count(listing.id) AS count 
FROM USER 
INNER JOIN listing ON USER.id = listing.user_id 
GROUP BY listing.country, USER.id 
ORDER BY count DESC; 

，結果我得到這個樣子的：

但是我想它按國家分組，以便用戶可以根據其列表數量按國家排列。有沒有辦法來解決這個問題？

Answer 1

你可以有多個ORDER BY列：

SELECT `user`.`id`, 
     `listing`.`country`, 
     count(`listing`.`id`) as `count` 
FROM `user` 
INNER JOIN `listing` ON (`user`.`id` = `listing`.`user_id`) 
GROUP BY `listing`.`country,` `user`.`id` 
ORDER BY `country`, `count` DESC;