按不同的列排序

Question

我在表categories

中有这些数据

id | name | post_count
 1 | A    | 10
 2 | B    | 15
 3 | C    | 8
 4 | D    | 14
 5 | E    | 1
 6 | F    | 20

我想按post_count提取前4个类别，并按name排序。

如果我这样做

SELECT * FROM categories ORDER BY post_count DESC LIMIT 4

我会按顺序获取类别：F, B, D, A，而我想要A, B, D, F

单个SQL查询是否可以实现？我怎么能这样做？

Answer 1

您可以使用子查询：

SELECT * FROM (SELECT * FROM 
               categories ORDER BY 
               post_count DESC LIMIT 4) AS A
ORDER BY name 

See this SQLFiddle

Answer 2

select * from (

SELECT * FROM categories ORDER BY post_count DESC LIMIT 4)a
order by name

Answer 3

select *
from (
    select *
    from categories
    order by post_count desc
    limit 4
) s
order by name