Subquery in CTE - sql-server

Question

i'm trying to get the status of student after the semester ends
and then update the status in it's table
can i use subquery inside the CTE ??
;with temp As
(
select CASE WHEN Status = 0 then 'Passed'
when status >0 and status < 2 then 'uncomplete'
else 'Failed' end Studentstatus
from
(
SELECT StudentID,
sum(CASE WHEN CourseStatus =1 then 1 else 0 end) Status
FROM StudentFinalResultsDetails
group by StudentID
)As t
)--the error in this line
the problem is
Incorrect syntax near ')'

Answer 1

You don't need a subquery for this, either use a CTE or subquery; you are mixing both of them, just do this:
with temp As
(
SELECT StudentID,
sum(CASE WHEN CourseStatus =1 then 1 else 0 end) Status
FROM StudentFinalResultsDetails
group by StudentID
) -- You have to select something after the brackets
select CASE WHEN Status = 0 then 'Passed'
when status >0 and status < 2 then 'uncomplete'
else 'Failed' end AS Studentstatus
from temp
Or: remove WITH CTE:
select CASE WHEN Status = 0 then 'Passed'
when status >0 and status < 2 then 'uncomplete'
else 'Failed' end Studentstatus
from
(
SELECT StudentID,
sum(CASE WHEN CourseStatus =1 then 1 else 0 end) Status
FROM StudentFinalResultsDetails
group by StudentID
)As t
Update
The problem in the query in your question, you have to move the part:
select CASE WHEN Status = 0 then 'Passed'
when status >0 and status < 2 then 'uncomplete'
else 'Failed' end AS Studentstatus`
to the outer of the brackets of the WITH temp ( .... ) then after it select whatever you want from it.
Because:
A CTE must be followed by a single SELECT, INSERT, UPDATE, or DELETE
statement that references some or all the CTE columns. A CTE can also
be specified in a CREATE VIEW statement as part of the defining SELECT
statement of the view.
In your query, you didn't put any statements after it. See reference