Question

如何在SQL Server中对计数值求和？

我有表1.我想总结计数值。

怎么做？

SELECT Top 10 count(d.name) as countname,d.name as name ,sum(count(d.name)) as sumcount
FROM table 1 as d 
group by d.name order by count(d.name) desc

我想显示countname，name，sumcount。怎么做？

Answer 1

我不确定我是否理解您的问题，但如果您只想获得所有count(d.name)值的总和，那么这样就可以为您做到：

select sum(countname) as TotalCount
from
(
    SELECT Top 10 
        count(d.name) as countname,
        d.name as name
    FROM [table 1] as d  
    group by d.name 
    order by count(d.name) desc 
)a

Answer 2

将with rollup添加到查询的末尾

Answer 3

扩展@Shark提供的答案，MySQL语法如下所示：

set @TotalCount = (select sum(countname) from (
    select count(d.name) as countname, d.name as name
    from table 1 as d
    group by name
    order by countname desc
    limit 10
) a);

select count(d.name) as countname, d.name as name, @TotalCount
FROM table 1 as d 
group by name 
order by countname desc
limit 10;

您可能需要查找MS SQL语法来设置局部变量和限制。

如何在SQL Server中总计计数值？

3 个答案: