Question

From the StudentDetails Table

StudentDetails

SID   Name   CourseCompleted

1    Andrew   CS001
1    Andrew   CS002
1    Andrew   CS003

2    Grey     CS001 
2    Grey     CS005 
2    Grey     CS002

3    Jon      CS002   
3    Jon      CS005 
3    Jon      CS008 

How to generate the folowing output ( Course not completed by each student)

SID   Name   Course Not Completed

1    Andrew   CS005
1    Andrew   CS008

2    Grey     CS003 
2    Grey     CS008 

3    Jon      CS001   
3    Jon      CS003 

Answer 1

select distinct a.SID, a.Name, b.CourseCompleted as `Course Not Completed`
from StudentDetails a,
(select distinct CourseCompleted from StudentDetails) b
where not exists
(select 1 from StudentDetails where SID = a.SID and CourseCompleted = b.CourseCompleted)
order by a.SID