Question

I am using Join in sql for first time with respect to many tables, I have got error with this :

I have three tables,

Semester table

StudentID Department Semester
1          1           1

Course Table

CourseID CourseName Semester 
1          S.E         1
2          D.B         1

ExamAttend Table(foreign keys as StudentID and CourseID)

StudentID CourseID Marks
1           1        88
1           2        90

I am trying to get the reslut through

Select CourseName,Marks 
from CourseID 
Inner Join ExamAttend on (
    Select CourseID from Course as c, Semester as s where s.Semester = c.Semester 
) = ExamAttend.CourseID;

This query is Showing me error that subquery cannot return multiple query when used with ‘=’

Anyone can suggest me a way to get the query done? Am i missing any syntax with inner join?

Answer 1

SELECT CourseName,Marks 
FROM Course C INNER JOIN ExamAttend E
ON C.CourseID = E.CourseID 
INNER JOIN Semester S
ON S.StudentID = E.StudentID