用case语句对一组列求和

Question

我有一个SQL语句，它根据值选择一组数据。

Select case when Count(score) >= 2 then 2 else Count(score) end as Count
        from table 
        where questions = answered and score= 3
        group by Surveyid

这打印出以下内容（这是正确的）

我最终需要将所有这些值加在一起。我已经想出了这个，但是我遇到了错误，似乎无法解决问题。

Select Sum(*)
From (   Select case when Count(score) >= 2 then 2 else Count(score) end as Count
            from table 
            where questions = answered and score= 3
            group by Surveyid ) C

Answer 1

可能因为Sum（*），请尝试

Select Sum(C.Count)

Answer 2

这解决了这个问题。

Select Sum(Count)
From (   Select case when Count(score) >= 2 then 2 else Count(score) end as Count
            from table 
            where questions = answered and score= 3
            group by Surveyid ) C