mysql - 在 mysql 中一起使用 order by 和 group by

Question

有一个名为 sample 的表，其中包含列名称和游戏。

name      games  
a        tennis  
b        tennis  
c        football  
d        shuttle  
e        basketball  
f        football  
g        football 

等等。

我需要前 2 个玩得最多的游戏和前 2 个玩得最少的游戏的列表。 group by 和 order by 如何一起使用？

Answer 1

如果你想要一个计数，你可以这样做

select count(*)  as num, games from sample 
group by games 
order by  num

前两个

select count(*)   as num, games from sample 
group by games 
order by  num limit 2

最后两个

select count(*)  as num, games from sample 
group by games 
order by  num DESC limit 2