c# - 如何获取数据计数并使用 SQL 对其进行分类？

Question

我有一个数据库如下：

现在我想获得COUNT分类为小于或大于 5 s 和GROUP BY Name. 然后我需要在gridview中显示数据。

任何人都可以告诉我 SQL 命令或任何其他方法吗？

Answer 1

SELECT Name, COUNT(Time) 
FROM MyTable 
GROUP BY Name
HAVING COUNT(Time) > 5 OR COUNT(Time) < 5 

或者

SELECT Name, COUNT(Time) 
FROM MyTable 
GROUP BY Name    
HAVING COUNT(Time) <> 5

Answer 2

select Name, COUNT(Time) 
FROM Table 
GROUP BY Name 
having  COUNT(Time) <>5

Answer 3

我想你要求的是...

SELECT Name, case when time<5 then 'less' else '5 or over' end, COUNT(*)  
FROM yourtable
GROUP BY Name , case when time<5 then 'less' else '5 or over' end

或作为列

select name, 
    SUM(case when time<5 then 1 else 0 end) as unders, 
    SUM(case when time>=5 then 1 else 0 end) as overs
from yourtable
group by name