Sql Server：学生计数和组标记

Question

我有一个这个表;

<table><tbody><tr><th>StudentID</th><th>AcademicYear</th><th>Term</th><th>StudentName</th><th>Class</th><th>Marks</th><th>Position</th><th>Count</th></tr><tr><td>12013</td><td>2015</td><td>One</td><td>Adamu A. Msangi</td><td>Form IV</td><td>80</td><td>1</td><td>5</td></tr><tr><td>52013</td><td>2015</td><td>One</td><td>Angela M. Lucas</td><td>Form IV</td><td>67</td><td>2</td><td>5</td></tr><tr><td>22014</td><td>2014</td><td>Two</td><td>Agness Daudi Martin</td><td>Form II</td><td>60</td><td>3</td><td>5</td></tr><tr><td>32014</td><td>2014</td><td>Two</td><td>Agness John Missana</td><td>Form II</td><td>51</td><td>4</td><td>5</td></tr><tr><td>42013</td><td>2015</td><td>One</td><td>Andrea F. Agustino</td><td>Form IV</td><td>50</td><td>5</td><td>5</td></tr></tbody></table>

这我通过运行该SQL语句：

SELECT 
    *, 
    ROW_NUMBER() OVER (ORDER BY Marks DESC) AS Position, 
    COUNT(StudentID) OVER() AS 'Count' 
FROM 
    Student 

我要找应显示学生的位置和学生总数的输出。例如，如果我查询ID号的学生; 42013和期限=“一”和AcademicYear = 2015和class =“IV型”，我应该得到下表类似的结果：

<table><tbody><tr><th>StudentID</th><th>AcademicYear</th><th>Term</th><th>StudentName</th><th>Class</th><th>Marks</th><th>Position</th><th>Count</th></tr><tr><td>42013</td><td>2015</td><td>One</td><td>Andrea F. Agustino</td><td>Form IV</td><td>50</td><td>5</td><td>3</td></tr></tbody></table>

这是我尝试没有成功;

SELECT 
    *, 
    ROW_NUMBER() OVER (ORDER BY Marks DESC) AS Position, 
    COUNT(StudentID) OVER() AS 'Count' 
FROM 
    Student 
WHERE 
    StudentID = 42013 
    AND Term = 'One' 
    AND AcademicYear = 2015 
    AND Class = 'Form IV' 

这怎么办？

感谢

Answer 1

你可以把你的查询中的子查询，然后将其过滤：

select * 
from (
    select t.*, ROW_NUMBER() over (
      partition by term, class, academicyear 
      order by Marks desc 
      ) as Position, count(StudentID) over (partition by term, class, academicyear) as Student_count 
    from Student t 
    ) t 
where StudentID = 42013 
    and Term = 'One' 
    and AcademicYear = 2015 
    and Class = 'Form IV'