联合查询总和-语法错误-SQL Server

Question

I am trying to do sum on union query and I am getting

Syntax error: incorrect syntax near ')'

Code:

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

I am sure I am missing something very small but couldn't figure out

Answer 1

You need to alias the subquery:

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