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Exclude records that match or many instances of a value from an oracle query

Posted on 2016-10-18
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Last Modified: 2016-11-06
Using the query below, is it possible to exclude all instances of a Student_Number if the total instances of 'F' in STOREDGRADES.GRADE is greater than 1?  Thanks so much!!

SELECT     
STUDENT_NUMBER,
LAST_NAME,
FIRST_NAME,
STOREDGRADES.STORECODE, 
SECTIONS.TERMID, 
STOREDGRADES.COURSE_NAME, 
STOREDGRADES.COURSE_NUMBER, 
SECTIONS.SECTION_NUMBER, 
STOREDGRADES.TEACHER_NAME, 
STOREDGRADES.GRADE,  
STUDENTS.GRADE_LEVEL

FROM         
PS.STOREDGRADES STOREDGRADES
LEFT JOIN PS.STUDENTS STUDENTS ON STOREDGRADES.STUDENTID = STUDENTS.ID 
LEFT JOIN PS.SECTIONS SECTIONS ON SECTIONS.ID = STOREDGRADES.SECTIONID
LEFT JOIN PS.COURSES COURSES ON STOREDGRADES.COURSE_NUMBER = COURSES.COURSE_NUMBER

WHERE     
(STOREDGRADES.TERMID >= 2500) 
AND (STOREDGRADES.TERMID <= 2599) 
AND (STOREDGRADES.STORECODE IN ('Y1')) 
AND (STUDENTS.SCHOOLID IN (61)) 
AND (STUDENTS.GRADE_LEVEL = 10)
AND (STUDENTS.ENROLL_STATUS = 0)
AND (STOREDGRADES.GRADE IS NOT NULL)

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Question by:Basssque
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4 Comments
 
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sdstuber earned 2000 total points (awarded by participants)
ID: 41848641
SELECT student_number,
       last_name,
       first_name,
       storecode,
       termid,
       course_name,
       course_number,
       section_number,
       teacher_name,
       grade,
       grade_level
  FROM (SELECT student_number,
               last_name,
               first_name,
               storedgrades.storecode,
               sections.termid,
               storedgrades.course_name,
               storedgrades.course_number,
               sections.section_number,
               storedgrades.teacher_name,
               storedgrades.grade,
               students.grade_level,
               COUNT(CASE WHEN storedgrades.grade = 'F' THEN 1 END)
                   OVER (PARTITION BY student_number)
                   student_f_cnt
          FROM ps.storedgrades storedgrades
               LEFT JOIN ps.students students ON storedgrades.studentid = students.id
               LEFT JOIN ps.sections sections ON sections.id = storedgrades.sectionid
               LEFT JOIN ps.courses courses ON storedgrades.course_number = courses.course_number
         WHERE     (storedgrades.termid >= 2500)
               AND (storedgrades.termid <= 2599)
               AND (storedgrades.storecode IN ('Y1'))
               AND (students.schoolid IN (61))
               AND (students.grade_level = 10)
               AND (students.enroll_status = 0)
               AND (storedgrades.grade IS NOT NULL))
 WHERE student_f_cnt <= 1
0
 
LVL 32

Expert Comment

by:awking00
ID: 41848694
I'm not sure, but I suspect that student_name is not in the storedgrades table, so you may want to partition by storedgrades.student_id. (NO POINTS, PLEASE!)
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LVL 74

Expert Comment

by:sdstuber
ID: 41848774
the partitioning clause doesn't require all of the columns to be in the same table.

my guess is student id and student number can probably be used interchangeably.

however, if they can't,  the described requirement is to count Fs by student number, so that is what should drive the partitioning clause.
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