选择多个最大行 [英] Selecting multiple maximum rows

问题描述

假设我有一个名为Domain的MySQL表.如何从此表中找到最受欢迎的电子邮件域.我直接想找到具有最大计数的所有行.

Suppose I have a MySQL table named Domain. How can I find the most popular email domain from this table. Directly I want to find all rows with the maximum count.

Domain    
gmail.com    
gmail.com    
gmail.com    
yahoo.com    
yahoo.com    
yahoo.com    
rediffmail.com    
rediffmail.com
mail.com

我想要的输出:

Domain      No_of_users
gmail.com   3
yahoo.com   3

推荐答案

select
  x.Domain,
  x.No_of_users
from
  (select
    d.Domain, 
    count(d.Domain) as No_of_users
  from
    Domain d
  group by 
    d.Domain) x
where
  x.No_of_users = 
    (select
      max(x2.No_of_users)
    from
      (select
         d2.Domain,
         count(d2.Domain) as No_of_users
      from
         Domain d2
      group by 
        d2.Domain) x2)

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