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Calculating total percentage per row in Oracle Query

Posted on 2016-10-04
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Last Modified: 2016-10-04
I need to add a column that gives me a total percentage.  The issue I'm having is, I need to get the percentage of each row against the total number of students regardless of if S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' or not.  For example, if I had 1000 students enrolled total and the total of row 1 equals 20, then the total percentage for row 1 would be 2%.  Thanks!!

SELECT
SCHOOLS.NAME as "School",
COUNT(CASE WHEN grade_level = '9' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "9",
COUNT(CASE WHEN grade_level = '10' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "10",
COUNT(CASE WHEN grade_level = '11' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "11",
COUNT(CASE WHEN grade_level = '12' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "12"
from PS.STUDENTS STUDENTS
LEFT JOIN PS.SCHOOLS SCHOOLS on STUDENTS.SCHOOLID = SCHOOLS.SCHOOL_NUMBER
LEFT JOIN PS.S_CT_STU_SPED_X S_CT_STU_SPED_X ON STUDENTS.DCID = S_CT_STU_SPED_X.STUDENTSDCID
where enroll_status=0 
AND SCHOOLID IN (3, 4, 7, 8, 9)
group by SCHOOLS.NAME

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Question by:Basssque
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sdstuber earned 2000 total points
ID: 41828015
SELECT
SCHOOLS.NAME as "School",
COUNT(CASE WHEN grade_level = '9' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "9",
COUNT(CASE WHEN grade_level = '10' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "10",
COUNT(CASE WHEN grade_level = '11' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "11",
COUNT(CASE WHEN grade_level = '12' AND S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end) "12",
round(count(case when S_CT_STU_SPED_X.SPECIALEDUCATION = 'Y' THEN 1 end)/ count(*) * 100, 2) pct_in_special_education
from PS.STUDENTS STUDENTS
LEFT JOIN PS.SCHOOLS SCHOOLS on STUDENTS.SCHOOLID = SCHOOLS.SCHOOL_NUMBER
LEFT JOIN PS.S_CT_STU_SPED_X S_CT_STU_SPED_X ON STUDENTS.DCID = S_CT_STU_SPED_X.STUDENTSDCID
where enroll_status=0 
AND SCHOOLID IN (3, 4, 7, 8, 9)
group by SCHOOLS.NAME

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Author Comment

by:Basssque
ID: 41828051
Perfect, thank you!!!
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