Sql 在pivot查询中获取错误的输出

考勤表样本数据-

+--------------+-------------+-----------+------------+------------+
| EnrollmentNo | SubjectCode |   Date    | Attendance | CourseCode |
+--------------+-------------+-----------+------------+------------+
| DDU-140/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/11/2018 |          2 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/14/2018 |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/9/2018  |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/14/2018 |          0 | BSCCS      |
+--------------+-------------+-----------+------------+------------+

+--------------+--------+-------------+------------+------+
| EnrollmentNo | RollNO | CollegeCode | CourseCode | Year |
+--------------+--------+-------------+------------+------+
| DDU-140/12   |     22 | DDUC        | BSCCS      | 2012 |
| DDU-286/12   |     15 | DDUC        | BSCCS      | 2012 |
| DDU-320/12   |     38 | DDUC        | BSCCS      | 2012 |
+--------------+--------+-------------+------------+------+

+--------------+-------------+
| EnrollmentNo | SubjectCode |
+--------------+-------------+
| DDU-140/12   | CSHT101     |
| DDU-286/12   | CSHT101     |
| DDU-286/12   | CSHT102     |
| DDU-320/12   | CSHT101     |
| DDU-320/12   | CSHT102     |
+--------------+-------------+

+-------------+---------------------------+
| SubjectCode |        SubjectName        |
+-------------+---------------------------+
| CSHP101     | Software Lab based on 101 |
| CSHT101     | Programming Fundamentals  |
| CSHT102     | Discrete Structures       |
+-------------+---------------------------+

学生表格样本数据-

+--------------+-------------+-----------+------------+------------+
| EnrollmentNo | SubjectCode |   Date    | Attendance | CourseCode |
+--------------+-------------+-----------+------------+------------+
| DDU-140/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/11/2018 |          2 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/14/2018 |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/9/2018  |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/14/2018 |          0 | BSCCS      |
+--------------+-------------+-----------+------------+------------+

+--------------+--------+-------------+------------+------+
| EnrollmentNo | RollNO | CollegeCode | CourseCode | Year |
+--------------+--------+-------------+------------+------+
| DDU-140/12   |     22 | DDUC        | BSCCS      | 2012 |
| DDU-286/12   |     15 | DDUC        | BSCCS      | 2012 |
| DDU-320/12   |     38 | DDUC        | BSCCS      | 2012 |
+--------------+--------+-------------+------------+------+

+--------------+-------------+
| EnrollmentNo | SubjectCode |
+--------------+-------------+
| DDU-140/12   | CSHT101     |
| DDU-286/12   | CSHT101     |
| DDU-286/12   | CSHT102     |
| DDU-320/12   | CSHT101     |
| DDU-320/12   | CSHT102     |
+--------------+-------------+

+-------------+---------------------------+
| SubjectCode |        SubjectName        |
+-------------+---------------------------+
| CSHP101     | Software Lab based on 101 |
| CSHT101     | Programming Fundamentals  |
| CSHT102     | Discrete Structures       |
+-------------+---------------------------+

StudentSubject表样本数据-

+--------------+-------------+-----------+------------+------------+
| EnrollmentNo | SubjectCode |   Date    | Attendance | CourseCode |
+--------------+-------------+-----------+------------+------------+
| DDU-140/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/11/2018 |          2 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/14/2018 |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/9/2018  |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/14/2018 |          0 | BSCCS      |
+--------------+-------------+-----------+------------+------------+

+--------------+--------+-------------+------------+------+
| EnrollmentNo | RollNO | CollegeCode | CourseCode | Year |
+--------------+--------+-------------+------------+------+
| DDU-140/12   |     22 | DDUC        | BSCCS      | 2012 |
| DDU-286/12   |     15 | DDUC        | BSCCS      | 2012 |
| DDU-320/12   |     38 | DDUC        | BSCCS      | 2012 |
+--------------+--------+-------------+------------+------+

+--------------+-------------+
| EnrollmentNo | SubjectCode |
+--------------+-------------+
| DDU-140/12   | CSHT101     |
| DDU-286/12   | CSHT101     |
| DDU-286/12   | CSHT102     |
| DDU-320/12   | CSHT101     |
| DDU-320/12   | CSHT102     |
+--------------+-------------+

+-------------+---------------------------+
| SubjectCode |        SubjectName        |
+-------------+---------------------------+
| CSHP101     | Software Lab based on 101 |
| CSHT101     | Programming Fundamentals  |
| CSHT102     | Discrete Structures       |
+-------------+---------------------------+

主题表样本数据-

+--------------+-------------+-----------+------------+------------+
| EnrollmentNo | SubjectCode |   Date    | Attendance | CourseCode |
+--------------+-------------+-----------+------------+------------+
| DDU-140/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-140/12   | CSHT101     | 1/11/2018 |          2 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/9/2018  |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-286/12   | CSHT102     | 1/14/2018 |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/9/2018  |          2 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/10/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT101     | 1/11/2018 |          0 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/11/2018 |          1 | BSCCS      |
| DDU-320/12   | CSHT102     | 1/14/2018 |          0 | BSCCS      |
+--------------+-------------+-----------+------------+------------+

+--------------+--------+-------------+------------+------+
| EnrollmentNo | RollNO | CollegeCode | CourseCode | Year |
+--------------+--------+-------------+------------+------+
| DDU-140/12   |     22 | DDUC        | BSCCS      | 2012 |
| DDU-286/12   |     15 | DDUC        | BSCCS      | 2012 |
| DDU-320/12   |     38 | DDUC        | BSCCS      | 2012 |
+--------------+--------+-------------+------------+------+

+--------------+-------------+
| EnrollmentNo | SubjectCode |
+--------------+-------------+
| DDU-140/12   | CSHT101     |
| DDU-286/12   | CSHT101     |
| DDU-286/12   | CSHT102     |
| DDU-320/12   | CSHT101     |
| DDU-320/12   | CSHT102     |
+--------------+-------------+

+-------------+---------------------------+
| SubjectCode |        SubjectName        |
+-------------+---------------------------+
| CSHP101     | Software Lab based on 101 |
| CSHT101     | Programming Fundamentals  |
| CSHT102     | Discrete Structures       |
+-------------+---------------------------+

输出-

使用参数显示错误的输出-

@enrollno = 'DDU-320/12',
@startdate = '1/9/2018',
@enddate = '1/11/2018'

当2,1,0和NA时，应显示NA，1，而不是2,1,1和2,1,1

无法指出我犯的错误。谁能看一下吗

CREATE PROCEDURE GET_ATTENDANCE_REPORT_FOR_STUDENT
@enrollno varchar(10),
@startdate DATE,  
@enddate DATE

AS BEGIN

DECLARE @query as varchar(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 Concat(S.SubjectCode,'' '',S.SubjectName) Subject' + @query + '
              from Attendance A, Student St, StudentSubject SS, Subject S
              where A.EnrollmentNo=St.EnrollmentNo and St.EnrollmentNo=SS.EnrollmentNo and SS.SubjectCode=S.SubjectCode and St.EnrollmentNo =''' + @enrollno + '''
              Group By S.SubjectName,S.SubjectCode';


Execute (@query)
END

---

缺少联接条件，考勤表也需要使用SubjectCode联接。由于缺少条件，它正在从两个主题代码中选择日期

在老式的逗号分隔联接上也开始使用内部联接语法。在ON子句中保留联接条件，在Where子句中保留筛选器

---

话虽如此，根据预期结果，您首先不需要这两个表

以表格格式将示例数据添加为文本。。不要使用图像显示示例数据没有人可以使用它来测试Attention.DateAttention.Date-Date和Attention.Attention-numericQuery的数据类型在我看来很好。。除了您显示的记录外，我相信您还有更多的注册记录编号：DDU-320/12。运行此查询并查看Selectfromtainment，其中EnrollmentNo='DDU-320/12'Nope。给你看满桌的。“DDU-320/12”的记录不超过4条。