获取潜在客户名称的最大数量

Question

我的数据集名称bollywood.csv：

这是我的数据。 我需要在电影中担任主角最多的演员。 我需要男主角的名字和主演的电影数量。

我的代码是：

select lead, count(*) as nos from bollywood group by lead order by nos desc;

结果是：

Amitabh 3
Akshay  3
John    3
Riteish 2
Shahrukh    2
Sunny   2
Emraan  2
Katrina 2
Nawazuddin  2
Tiger   2
Sharman 2
Manoj   2
Vidya   1
Tusshar 1
Tannishtha  1
Sushant 1
SunnyDeol   1
Sonam   1
Sonakshi    1
Siddarth    1
Shahid  1
Sandeep 1
Salman  1

Answer 1

按（oracle）的顺序使用rownum伪列。

select from (
  select lead, count(*) as nos
  from bollywood
  group by lead
  order by lead desc
)
where rownum = 1

Answer 2

如果您想让所有演员担任主要角色（可能有多个记录）：

    select lead, count(*) as nos
       from bollywood
         group by lead
           having count(*) = 
             (select max(cnt) from
               (select lead, count(*) cnt 
                 from bollywood 
                    group by lead ) tblBolly )

Answer 3

使用窗口功能：

select lead, cnt
from (select lead, count(*) as cnt,
             rank() over (order by count(*) desc) as rnk
      from bollywood
      group by lead
     ) b
where rnk = 1;