得到某种从表

Question

一列的前十名之列的，我想从表中的MySQL数据库得到某种十大名单。 下面是一个例子。比方说，我有这个表：

ID Username Town 
1 foo   Munich 
2 bar   Kolding 
3 herp  Bordeaux 
4 derp  Bordeaux 
5 test  Cologne 
6 bla   Munich 
7 blob  Bordeaux 

而现在，我想获得在“城”中最常见的项目，如：

Bordeaux 3 
Munich 2 
Cologne 1 
Kolding 1 

什么样的查询可以做到这一点？

Answer 1

这个怎么样。

SELECT Town, Count(1) as TownCount 
FROM myTable 
GROUP BY Town 
ORDER BY TownCount DESC; 

如果你想只有10条记录，使用

SELECT Town, Count(1) as TownCount 
FROM myTable 
GROUP BY Town 
ORDER BY TownCount DESC 
LIMIT 10; 

Answer 2

SELECT Town, COUNT(*) AS cnt FROM my_table GROUP BY Town ORDER BY cnt DESC LIMIT 10 

Answer 3

试试这个 -

SELECT town, 
     count(*) 
FROM tablename 
GROUP BY town;