总和的联合查询 - 语法错误 - SQL服务器

Question

我试图做联合查询和与我得到

Syntax error: incorrect syntax near ')'

代码：

select 
    sum(rate) 
from 
    (select 
     sum(UnitsDelivered * Rate) as rate 
    from 
     Reimbursement_EBSUtilization 
    where 
     PRR_Id = 1 

    UNION ALL 

    select 
     sum(Reimbursement_CDSUtilization.Rate * CDSUtilization.UnitsDelivered) as rate 
    from 
     Reimbursement_CDSUtilization 
    left join 
     CDSUtilization on Reimbursement_CDSUtilization.CDSU_Id = CDSUtilization.Id 
    where 
     Reimbursement_CDSUtilization.PRR_Id = 270 
)--syntax error is showing here 

我确信我很失去了一些东西小而无法弄清楚

Answer 1

您需要别名子查询：

select sum(rate) from 
(
    select sum(UnitsDelivered*Rate) as rate 
    from Reimbursement_EBSUtilization 
    where PRR_Id =1 

    UNION ALL 

    select sum(Reimbursement_CDSUtilization.Rate * CDSUtilization.UnitsDelivered) as rate 
    from Reimbursement_CDSUtilization 
    left join CDSUtilization on Reimbursement_CDSUtilization.CDSU_Id = CDSUtilization.Id 
    where Reimbursement_CDSUtilization.PRR_Id = 270 
) as t -- <-- use alias here