Running query based on other query result

Question

Hi Again Friends.
first of all i am very much thankful for members who sent me prompt response and been helping for last 2 days.I am again with query,maybe a lame one.
I want to run a query based on record return from previous query.FOr instance i have query
Select sum(marks) from studentMarks,student_id where course_Id=4 and student_Id
IN
(Select StudentId from Student where dept_id=3)
the courseID and studentID are being repeated in the above table
now I want to show Student Names with the marks Obtained and who belong to dept_id=3,i want to run other query to get Name based on StudentId resutned from previous one.
Is there anyway to do this in oracle to save result in some resultSe and use it later?
Thankyou

Answer 1

Do you mean something like:
Select sum(marks), S.StudentId, S.StudentName
from StudentMarks M
,      Student          S
where S.course_Id=4
and  M.Student_id = S.StudentId
and S.student_Id
IN
(Select StudentId from Student where dept_id=3)
group by StudentId, StudentName