从表中获取某一列的十大列表

Question

我想从MySQL数据库的表中获得某种前十名列表。这是一个例子。假设我有这张表：

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

现在，我想获得'Town'中最常见的条目，如下所示：

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;

如果您只想要10条记录，请使用

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;