MYSQL按另一个表的行数排序

Question

我有2个表：代码和code_like

代码表

code_id | code_name
---------------
1       | pagination
2       | function 
3       | script

code_like table

like_id | code_id(id of code table)
1       | 3
2       | 1
3       | 3
4       | 2
5       | 1
6       | 3

我想按code table表

的行数对code_like进行排序

示例：

I want result like
 (1)  script     (1st because 3 times in code_like table)
 (2)  pagination (2nd because 2 times in code_like table)
 (3)  function   (3rd because 1 time in code_like table)

Answer 1

使用联接和按照代码计数的顺序

select c.*
from code c
left join code_like l on c.id = l.code_id
group by c.id
order by count(*) desc

DEMO

Answer 2

这里需要COUNT，JOIN和GROUP BY

SELECT c.code_name, count(*) AS rowcount 
FROM code c LEFT JOIN code_like l ON l.code_id = c.id 
GROUP BY c.id 
ORDER BY rowcount DESC

sqlfiddle

Answer 3

你可以试试这个：

SELECT *
, (SELECT COUNT(*) FROM code_like WHERE code_like.code_id = code.id ) AS like
FROM code 
ORDER BY (SELECT COUNT(*) FROM code_like WHERE code_like.code_id = code.id ) DESC

OR

SELECT * FROM ( SELECT *
, (SELECT COUNT(*) FROM code_like WHERE code_like.code_id = code.id ) AS like
FROM code 
) AS code_was_like 
ORDER BY like DESC

我希望这有帮助。

Answer 4

SELECT c . * 
FROM code AS c
INNER JOIN code_like AS cl ON cl.code_id = c.id
GROUP BY c.id
ORDER BY COUNT( cl.code_id ) DESC