使用 Cte 的结果设置变量输出答案

【问题标题】：Setting a Variable Output with results from Cte's使用 Cte 的结果设置变量输出
【发布时间】：2020-10-21 12:45:16
【问题描述】：

我正在尝试创建一个存储过程，我想在其中使用 CTE 提供信息的 Select 语句来设置变量输出值：

这是我的代码：

Create procedure [dbo].[GetAvailableTime]
@ID int,
@week int,
@DirectTime int output

as

;with 

cte_stg1
as
(
select
tim.[TimesheetID] as [TimeSheet Tim]
,sum(st1.Mins) as [S1Mins]
from [dbo].[Timesheets] as tim
left join [dbo].[Stage1] as st1 on st1.[TimesheetID] = tim.[TimesheetID]
where st1.[TimesheetID] = tim.[TimesheetID]
group by tim.[TimesheetID]
),
--------------
cte_stg1l
as
(
select
tim.[TimesheetID] as [TimeSheet Tim]
,sum(s1l.[Mins]) as [S1LMins]
from [dbo].[Timesheets] as tim
left join [dbo].[Stage1Leave] as s1L on s1l.[TimesheetID] = tim.[TimesheetID]
where s1L.[TimesheetID] = tim.[TimesheetID]
group by tim.[TimesheetID]
)

set @DirectTime = (select Isnull(Sum(isnull(E.[WeeklyContractedHours],0) - isnull(cte_stg1l.[S1LMins],0) - isnull(cte_stg1.[S1Mins],0)),0)
                    from [dbo].[Employees] as E 
                    left join [dbo].[Timesheets] as tim on E.[EmployeeProfileID] = tim.[EmployeeID]
                    left join cte_stg1 as cte_stg1 on cte_stg1.[TimeSheet Tim] =tim.[TimesheetID]
                    left join cte_stg1l as cte_stg1l on cte_stg1l.[TimeSheet Tim] =tim.[TimesheetID]
                    where 
                    E.[EmployeePID] = @PID and
                    tim.[WeekID] = @week)

结果应该是一个代表分钟的整数值。

@DirectTime 
===========
1530

但是，我收到错误关键字“set”附近的语法不正确。

谁能告诉我我做错了什么，如果可能的话，建议我如何克服这个问题。

谢谢

【问题讨论】：

尝试将set @DirectTime = (select Isnull(Sum... 替换为select @DirectTime = Isnull(Sum... 并删除结尾的右括号。

标签： sql-server variables output common-table-expression

【解决方案1】：

尝试将set @DirectTime = (select Isnull(Sum... 替换为select @DirectTime = Isnull(Sum... 并删除结尾的右括号。

select @DirectTime = Isnull(Sum(isnull(E.[WeeklyContractedHours],0) - isnull(cte_stg1l.[S1LMins],0) - isnull(cte_stg1.[S1Mins],0)),0)
                    from [dbo].[Employees] as E 
                    left join [dbo].[Timesheets] as tim on E.[EmployeeProfileID] = tim.[EmployeeID]
                    left join cte_stg1 as cte_stg1 on cte_stg1.[TimeSheet Tim] =tim.[TimesheetID]
                    left join cte_stg1l as cte_stg1l on cte_stg1l.[TimeSheet Tim] =tim.[TimesheetID]
                    where 
                    E.[EmployeePID] = @PID and
                    tim.[WeekID] = @week

【讨论】：