Cross-listing Query (Partition By Clause? Self-Join?)

Question

Hello,
I need a query that will cross-list courses a professor is teaching this semester. Essentially, two fields need to be the same (i.e.: Section & CourseTitle), while the third field is different (i.e.: Subject).
For example, Max Power is a professor teaching 3 courses, one is cross-listed (ENG 123 and JRL 123):
LastName     FirstName     Subject     Section     CourseTitle
Power          Max          ENG     123     English Composition
Power          Max          ENG     452     Robert Frost Poetry     
Power          Max          JRL     123     English Composition
Power           Max          ENG      300     Faulkner & TwainThe desired query output is this:
LastName     FirstName     Subject     Section     CourseTitle
Power          Max          ENG     123     English Composition
Power          Max          JRL     123     English CompositionBasically, I need only the cross-listed courses in the output.Is this an instance where I use a "Partition By Clause" or should I create a self-join?
Much thanks for any help and comments.

Answer 1

Unfortunately, I can't create new tables. I don't have permission. I can't alter, add or delete any of the data.
So I tried Frank's code with my data:
WITH got_cnt AS
SELECT  sivasgn_term_code, spriden_id, spriden_last_name, spriden_first_name,
                ssbsect_ptrm_code, ssbsect_camp_code,
                sivasgn_crn, ssbsect_subj_code, ssbsect_crse_numb, scbcrse_title,
       count(*) over (partition by ssbsect_crse_numb, scbcrse_title) cnt
FROM spriden INNER JOIN sivasgn ON spriden_pidm = sivasgn_pidm JOIN
     ssvsect ON ssbsect_crn = sivasgn_crn JOIN
     sfrstcr ON sfrstcr_crn = sivasgn_crn
WHERE  ssbsect_term_code= sivasgn_term_code  
AND sfrstcr_term_code = sivasgn_term_code
AND ssbsect_enrl > '0' and sivasgn_credit_hr_sess > '0'
AND sivasgn_term_code IN ('200901', '200909')
AND spriden_change_ind IS NULL
AND ssbsect_camp_code IN ('1', '2', 'A', 'B')
SELECT DISTINCT sivasgn_term_code, spriden_id, spriden_last_name, spriden_first_name,
                substr(ssbsect_ptrm_code,1,1) as ptrm_code, ssbsect_camp_code,
                sivasgn_crn, ssbsect_subj_code, ssbsect_crse_numb, scbcrse_title
FROM got_cnt
WHERE cnt >1
ORDER BY spriden_last_name, sivasgn_term_code, ssbsect_crse_numb;The output pretty much displays all courses with same subject code, course number and course title.
Output:
LastName     FirstName     Subject     Section     CourseTitle
Power          Max          ENG     123     English Composition
Power          Max          ENG     123     English Composition
Power          Max          ENG     452     Robert Frost Poetry
Power          Max          ENG     452     Robert Frost Poetry
Power           Max          ENG      300     Faulkner & Twain
Power           Max          ENG      300     Faulkner & Twain
Power          Max          JRL     123     English Composition
Power          Max          JRL     123     English CompositionWhat I would like is same course number, course title, BUT different subject code. Pretty much that in my first post of this thread.
Desired Output:
LastName     FirstName     Subject     Section     CourseTitle
Power          Max          ENG     123     English Composition
Power          Max          JRL     123     English CompositionMaybe I'm explaining this wrong. Any help would be greatly appreciated. Thanks.