SQL Combining Multiple Tables and Pivotting

Question

I have these tables

Student - studentID, batchID, courseID, FirstName, Last Name ...
Subject - subjectID, courseID, subjectName ...
Mark - markID, studentID, subjectID, Marks
Course - courseID, courseName ...

I have been trying this for so long and finally ended up with this...

SELECT S.studentID AS 'ID', S.FirstName + ' ' + S.LastName AS 'Full Name', M.Marks AS 'Subject'
FROM Student AS S
LEFT JOIN Mark AS M ON S.studentID = M.studentID AND M.subjectID = 'S1001'
WHERE S.batchID = 1

This one only shows the data for only one subject and the subject name is being generated by C# (Winforms) using the subjectID.

Student ID | Full Name    | Elementary Programming in C
-------------------------------------------------------
    1      | student name |        50
    2      | abc          |        80

but I want it to show all the subjects in that course and the respective marks in that column, like this (don't mind if i have to generate column headers using Winforms if subjectID is given)...

Student ID | Full Name    | Elementary Programming in C | HTML | ...
-----------------------------------------------------------------
    1      | student name |        50                   |  70  | ...
    2      | abc          |        80                   |  60  | ...

I have tried using pivot, but it wasn't very successful... Hope someone can give me an idea or two, and if you need more information just ask...

Answer 1

Try this, DECLARE @cols AS NVARCHAR(MAX), @query AS NVARCHAR(MAX)

select @cols = stuff((select distinct ',' + quotename(subjectName) 
                from Subject WHERE courseID = 'C1001'
        FOR XML PATH(''), TYPE
        ).value('.', 'NVARCHAR(MAX)') 
    ,1,1,'')

set @query = 'select studentID,' + @cols + '
         from 
         (
            select S.studentID, ss.subjectID, M.Marks
            from Student S
              join Subject ss on S.courseID = ss.courseID 
              join Mark M on M.subjectID = ss.SubjectID AND M.studentID = S.StudentID
            where S.batchID = 1
        ) x
        pivot 
        (
            max(Marks)
            for subjectName in (' + @cols + ')
        ) p '

execute(@query)