SQL Server 2008：選擇具有最高重複值的列的名稱

Question

我試圖選擇一個字段的名稱，該字段最常出現在表中，並且其中的某個值爲true。

Select 
     Max(Count(Name)) 
From 
     EmployeeTreats 
Where 
     Donut = "Yes" 
     And 
     AmountEaten >= 10 

Error: Cannot perform an aggregate function on an expression containing an aggregate or a subquery.

我所尋找的顯然是這樣的：Edward has eaten the most with a sum total of 45

Name 
Edward 

Answer 1

這將處理多個名稱具有相同計數的情況。

select Name, count(*) 
from ExployeeTreats 
where Donut = "Yes" and AmountEaten >= 10 
group by Name 
having count(*) >= ALL (select count(*) 
         from EmployeeTreats 
         where Donut = "Yes" and AmountEaten >= 30 
         group by Name) 

Answer 2

根據您最初的問題：

select top (1) 
     [Name] 
    , count(1) as Cnt 
from Employees 
where Donut = 'yes' 
    and AmountEaten >= 10 
group by [Name] 
order by Cnt desc; 

您的編輯後：

select top (1) 
     [Name] 
    , sum(AmountEaten) as TotalEaten 
from Employees 
where Donut = 'yes' 
group by [Name] 
order by TotalEaten desc; 

Answer 3

訣竅是按名稱分組。然後按數量（*）降序排列，並剪掉頂部1.

select top 1 max(name) 
    from employeeTreats 
where donut='Yes' 
    and amountEaten >= 10 
group by name 
order by count(*) desc