| Calculate Percentage in SQL - URGENT PLEASE [message #19786] |
Tue, 09 April 2002 17:52  |
Shekar
Messages: 25
Registered: August 2000
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Junior Member |
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Could someone provide the sql query for the following
problem please?
Database:
TABLE TRANSCRIPT(student_ssn, d_code, c_no, grade);
question:
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For each course(combination of d_code and c_no) in the transcript table give the percentage of students who got grade 'A'.
Please reply with your sql query.
Thanks
- Shekar
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| Re: Calculate Percentage in SQL - URGENT PLEASE [message #19805 is a reply to message #19786] |
Wed, 10 April 2002 12:57  |
sridhar
Messages: 119
Registered: December 2001
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Senior Member |
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Try this,
SELECT b.course, round((cnt/total) * 100, 2) percentage
FROM
(Select count(*) total from TRANSCRIPT) a,
(Select count(*) cnt, d_code||c_no course from TRANSCRIPT WHERE grade = 'A'
Group By d_code||c_no course) b
Thanx,
SriDHAR
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