Percentage pass calculation - SQL Server Forums

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Percentage pass calculation

Author

Topic

j4ydh
Starting Member

18 Posts

Posted - 2012-01-13 : 12:26:15

Hi

I am trying to form a statement that can look at results saved in a table currently as bit (1) when answer is correct.

so if out of 10 possible questions if 9 are correct the percentage calculation would return greater than 80% representing a pass that could be recorded.

If there is a road map or information that would help it would be appreciated.

Thank you in advance
J

FischMan2
Yak Posting Veteran

59 Posts

Posted - 2012-01-13 : 12:38:41

How do you know that 80% is a pass? Is it hardcoded, or being pulled from a table somewhere?

Some psuedo-code (this won't work, but might give you an idea):


select c.studentid, cast(c.numcorrect > 0.8 as bit) as IsPassing from (
select b.studentid, (b.numcorrect / b.numtotalanswer) as percentcorrect from (
select a.studentid, sum(a.IsCorrect) as NumCorrect, a.numtotalanswers from StudentAnswers a where something = something
group by a.studentid, a.numtotalanswers) b
) c

FischMan

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