SQL中动态生成的列的行总和

这是生成班级月度出勤报告的过程，我想在其中添加一个列作为总计，该列应包含特定学生在两个日期之间的出勤总和，作为参数给出

那么，我应该做些什么来实现这一点，因为简单地计算出席人数就可以计算出表中所有日期的出席人数之和

CREATE PROCEDURE GET_ATTENDANCE_REPORT_FOR_FACULTY
@startdate DATE,  
@enddate DATE,
@coursecode nvarchar(10),
@subjectcode nvarchar(10)

AS BEGIN

DECLARE @query as varchar(MAX);
declare @stmt nvarchar(max);
declare @stmt1 nvarchar(max);

with cte (startdate) as 
(
    select @startdate startdate
    union all 
    select dateadd(DD, 1, startdate) 
    from cte
    where startdate < @enddate
)

select @query = coalesce(@query, '') + 
              N',coalesce(MAX(CASE when A.[Date] = ''' + 
              cast(cte.startdate as nvarchar(20)) + 
              N''' THEN Convert(varchar(10),A.[Attendance]) end), ''NA'') ' + 
              quotename(convert(char(6), cte.startdate,106))
from cte
where datename(weekday, cte.startdate) <> 'Sunday';

set @query = 'Select S.RollNo AS [Roll No],Concat(FirstName,'' '',LastName) AS Name' + @query + ',sum(Attendance) Total
          from Attendance A, Student S, UserDetails U
          where A.EnrollmentNo=S.EnrollmentNo and S.EnrollmentNo=U.userID and A.CourseCode=''' + @coursecode + ''' and A.SubjectCode =''' + @subjectcode + '''
          and A.Date between ''' + @startdate + ' and ' + @enddate + '''
          Group By S.RollNo,U.FirstName,U.LastName';


Execute (@query)
END

使用条件聚合

或者更好的方法，过滤where子句中的日期，还可以使用sp_executesql来参数化动态查询。使查询看起来干净

set @query = 'Select S.RollNo AS [Roll No],Concat(FirstName,'' '',LastName) AS Name' + @query + ',sum(Attendance) Total
              from Attendance A, Student S, UserDetails U
              where A.EnrollmentNo=S.EnrollmentNo and S.EnrollmentNo=U.userID and A.CourseCode= @coursecode and A.SubjectCode = @subjectcode 
              and A.[Date] between @startDate and @EndDate
              Group By S.RollNo,U.FirstName,U.LastName'


Execute sp_executesql @query, N'@coursecode varchar(100),@subjectcode varchar(100), @startDate date, @EndDate date',@coursecode,@subjectcode, @startDate, @EndDate

使用条件聚合

或者更好的方法，过滤where子句中的日期，还可以使用sp_executesql来参数化动态查询。使查询看起来干净

set @query = 'Select S.RollNo AS [Roll No],Concat(FirstName,'' '',LastName) AS Name' + @query + ',sum(Attendance) Total
              from Attendance A, Student S, UserDetails U
              where A.EnrollmentNo=S.EnrollmentNo and S.EnrollmentNo=U.userID and A.CourseCode= @coursecode and A.SubjectCode = @subjectcode 
              and A.[Date] between @startDate and @EndDate
              Group By S.RollNo,U.FirstName,U.LastName'


Execute sp_executesql @query, N'@coursecode varchar(100),@subjectcode varchar(100), @startDate date, @EndDate date',@coursecode,@subjectcode, @startDate, @EndDate