Difference between revisions of "NSS Tutorial"

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(Strongly Agree)
(Scores for Institutions in Manchester)
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<div class='hint' title='HINT'>
 
<div class='hint' title='HINT'>
You will need to use SUM and GROUP BY.
+
You will need to use SUM over the '''response''' column and GROUP BY '''subject'''
 
</div>
 
</div>
  
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<source lang='sql' class='ans'>
 
<source lang='sql' class='ans'>
SELECT subject,SUM(score)
+
SELECT subject,SUM(response)
 
   FROM nss
 
   FROM nss
 
  WHERE question='Q22'
 
  WHERE question='Q22'
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</div>
 
</div>
  
 
+
==Strongly Agree Numbers==
==Strongly Agree==
+
 
<div class='qu'>
 
<div class='qu'>
 
<p class='imper'>Show the total number of students who A_STRONGLY_AGREE to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.
 
<p class='imper'>Show the total number of students who A_STRONGLY_AGREE to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.
Line 148: Line 147:
 
</div>
 
</div>
  
==Strongly Agree==
+
==Strongly Agree, Percentage==
 
<div class='qu'>
 
<div class='qu'>
 
<p class='imper'>Show the percentage of students who A_STRONGLY_AGREE to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.
 
<p class='imper'>Show the percentage of students who A_STRONGLY_AGREE to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.
 
</p>
 
</p>
 +
Use the '''ROUND''' function to show the percentage without decimal places.
  
 
<source lang='sql' class='def'>
 
<source lang='sql' class='def'>
Line 162: Line 162:
  
 
<source lang='sql' class='ans'>
 
<source lang='sql' class='ans'>
SELECT subject,SUM(response*A_STRONGLY_AGREE)/SUM(response)
+
SELECT subject,
 +
  ROUND(SUM(response*A_STRONGLY_AGREE)/SUM(response),0)
 
   FROM nss
 
   FROM nss
 
  WHERE question='Q22'
 
  WHERE question='Q22'
 
   AND subject IN ('(8) Computer Science','(H) Creative Arts and Design')
 
   AND subject IN ('(8) Computer Science','(H) Creative Arts and Design')
 
GROUP BY subject
 
GROUP BY subject
 +
</source>
 +
</div>
 +
 +
 +
==Scores for Institutions in Manchester==
 +
<div class='qu'>
 +
<p class='imper'>Show the average scores for question 'Q01' for each institution that include 'Manchester' in the name.
 +
</p>
 +
The column '''score''' is a percentage - you must use the method outlined above to multiply the percentage by the '''response''' and divide by the total response. Give your answer rounded to the nearest whole number.
 +
 +
<source lang='sql' class='def'>
 +
SELECT institution,subject,score,response
 +
  FROM nss
 +
WHERE question='Q22'
 +
  AND (institution LIKE '%Manchester%')
 +
ORDER BY institution
 +
</source>
 +
 +
<source lang='sql' class='ans'>
 +
SELECT institution,
 +
  ROUND(SUM(response*score)/SUM(response),0) score
 +
  FROM nss
 +
WHERE question='Q22'
 +
  AND (institution LIKE '%Manchester%')
 +
GROUP BY institution
 +
</source>
 +
</div>
 +
 +
==Number of Computing Students in Manchester==
 +
<div class='qu'>
 +
<p class='imper'>Show the institution, the total sample size and the number of computing students for institutions in Manchester for 'Q01'.
 +
</p>
 +
 +
<source lang='sql' class='def'>
 +
SELECT institution,subject,score,response
 +
  FROM nss
 +
WHERE question='Q22'
 +
  AND (institution LIKE '%Manchester%')
 +
</source>
 +
 +
<source lang='sql' class='ans'>
 +
SELECT institution,
 +
  SUM(sample),
 +
  SUM(CASE WHEN subject LIKE '(8)%' THEN sample END) comp
 +
  FROM nss
 +
WHERE question='Q01'
 +
  AND (institution LIKE '%Manchester%')
 +
GROUP BY institution
 
</source>
 
</source>
 
</div>
 
</div>

Revision as of 17:18, 10 December 2012

FieldType
ukprnvarchar(8)
institutionvarchar(100)
subjectvarchar(60)
levelvarchar(50)
questionvarchar(10)
A_STRONGLY_DISAGREEint(11)
A_DISAGREEint(11)
A_NEUTRALint(11)
A_AGREEint(11)
A_STRONGLY_AGREEint(11)
A_NAint(11)
CI_MINint(11)
scoreint(11)
CI_MAXint(11)
responseint(11)
sampleint(11)
aggregatechar(1)

Contents

National Student Survey 2012

The National Student Survey http://www.thestudentsurvey.com/ is presented to thousands of graduating students in UK Higher Education. The survey asks 22 questions, students can respond with STRONGLY DISAGREE, DISAGREE, NEUTRAL, AGREE or STRONGLY AGREE.

The table nss has one row per institution, subject and question.

Check out one row

The example shows the number who responded for:

  • question 1
  • at 'Edinburgh Napier University'
  • studying '(8) Computer Science'

Show the the percentage who STRONGLY AGREE

SELECT response
  FROM nss
 WHERE question='Q01'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'
SELECT A_STRONGLY_AGREE
  FROM nss
 WHERE question='Q01'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'

Calculate how many agree or strongly agree

Show the institution and subject where the score is at least 100 for question 15.

SELECT response
  FROM nss
 WHERE question='Q01'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'
SELECT institution, subject
  FROM nss
 WHERE question='Q15'
   AND score>=100

Unhappy Computer Students

Show the institution and score where the score for '(8) Computer Science' is less than 50 for question 'Q15'

SELECT institution,score
  FROM nss
 WHERE question='Q15'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'
SELECT institution, score
  FROM nss
 WHERE question='Q15'
   AND score<50
   AND subject = '(8) Computer Science'

More Computing or Creative Students?

Show the total number of students who responded to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.

You will need to use SUM over the response column and GROUP BY subject

SELECT institution,score
  FROM nss
 WHERE question='Q15'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'
SELECT subject,SUM(response)
  FROM nss
 WHERE question='Q22'
   AND subject IN ('(8) Computer Science','(H) Creative Arts and Design')
GROUP BY subject

Strongly Agree Numbers

Show the total number of students who A_STRONGLY_AGREE to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.

The A_STRONGLY_AGREE column is a percentage. To work out the total number of students who strongly agree you must multiply this percentage by the number who responded (response) and divide by 100 - take the SUM of that.

SELECT institution,score
  FROM nss
 WHERE question='Q15'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'
SELECT subject,SUM(response*A_STRONGLY_AGREE/100)
  FROM nss
 WHERE question='Q22'
   AND subject IN ('(8) Computer Science','(H) Creative Arts and Design')
GROUP BY subject

Strongly Agree, Percentage

Show the percentage of students who A_STRONGLY_AGREE to question 22 for the subject '(8) Computer Science' show the same figure for the subject '(H) Creative Arts and Design'.

Use the ROUND function to show the percentage without decimal places.

SELECT institution,score
  FROM nss
 WHERE question='Q15'
   AND institution='Edinburgh Napier University'
   AND subject='(8) Computer Science'
SELECT subject,
  ROUND(SUM(response*A_STRONGLY_AGREE)/SUM(response),0)
  FROM nss
 WHERE question='Q22'
   AND subject IN ('(8) Computer Science','(H) Creative Arts and Design')
GROUP BY subject


Scores for Institutions in Manchester

Show the average scores for question 'Q01' for each institution that include 'Manchester' in the name.

The column score is a percentage - you must use the method outlined above to multiply the percentage by the response and divide by the total response. Give your answer rounded to the nearest whole number.

SELECT institution,subject,score,response
  FROM nss
 WHERE question='Q22'
   AND (institution LIKE '%Manchester%')
ORDER BY institution
SELECT institution,
  ROUND(SUM(response*score)/SUM(response),0) score
  FROM nss
 WHERE question='Q22'
   AND (institution LIKE '%Manchester%')
GROUP BY institution

Number of Computing Students in Manchester

Show the institution, the total sample size and the number of computing students for institutions in Manchester for 'Q01'.

SELECT institution,subject,score,response
  FROM nss
 WHERE question='Q22'
   AND (institution LIKE '%Manchester%')
SELECT institution,
  SUM(sample),
  SUM(CASE WHEN subject LIKE '(8)%' THEN sample END) comp
  FROM nss
 WHERE question='Q01'
   AND (institution LIKE '%Manchester%')
GROUP BY institution
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