如何计算在SQL Server百分比2008

Question

我有4列

• 局的查询，
• T1为谁了课程
• T2的数量董事会下的员工数量课程，该分局采取
• T3每个首长

我想补充那花费的总奖金，每局的总奖金的比例

其计算公式为(t3/total sum of t3) * 100

这是查询：

with cte1 as 
(
    select 
     vwemployee.directorateName, 
     count(distinct vwemployeeCourse.employeeId) as t1 
    from 
     vwemployee, vwemployeeCourse 
    where 
     vwemployee.directorateName = vwemployeeCourse.directorateName 
    group by  
     vwemployee.directorateName 
), cte2 as 
(
    select 
     vwemployee.directorateName, 
     count(vwemployee.directorateName) as t2 
    from 
     vwemployee, employeeCourse 
    where 
     vwemployee.Id = employeeCourse.employeeId 
    group by 
     vwemployee.directorateName 
), cte3 as 
(
    select 
     vwemployeeCourse.directorateName, 
     sum(vwCourse.cost) as t3 
    from 
     vwemployeeCourse, vwCourse 
    where 
     vwemployeeCourse.courseId = vwCourse.Id 
    group by 
     vwemployeeCourse.directorateName 
) 
select 
    cte1.directorateName, cte1.t1, cte2.t2, cte3.t3 
from 
    cte1 
inner join 
    cte2 on cte1.directorateName = cte2.directorateName 
inner join 
    cte3 on cte2.directorateName = cte3.directorateName 

到目前为止，我已经学会了如何查询组合在一起，但我想学习如何使用上面的操作。

Answer 1

您可以使用窗口类函数：

with . . . 
select cte1.directorateName, cte1.t1, cte2.t2, cte3.t3, 
     cte3.t3/sum(cte3.t3) over() 
from cte1 inner join 
    cte2 
    on cte1.directorateName = cte2.directorateName inner join 
    cte3 
    on cte2.directorateName = cte3.directorateName; 

如果t3是一个整数，那么你需要将其转换为数字带小数点（SQL Server执行整数除法）：

with . . . 
select cte1.directorateName, cte1.t1, cte2.t2, cte3.t3, 
     cte3.t3*100.0/sum(cte3.t3) over() 
from cte1 inner join 
    cte2 
    on cte1.directorateName = cte2.directorateName inner join 
    cte3 
    on cte2.directorateName = cte3.directorateName;