Solution for SUM and COUNT with nobel table #10
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pb1988ster
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Apr 7, 2018
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The qsn :"Show the year and subject where 3 prizes were given. Show only years 2000 onwards " is looking at unique combinations of yr and subject . So correct ans is select yr,subject from nobel
where yr >= 2000
group by yr,subject
having count(yr||subject)=3
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Out of curiosity, regarding question 8, "For each subject show how many years have had prizes awarded.", how would you do it, if the question was instead "For each subject show how many years have had 0 prizes awarded." ? |
Aewold
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Jul 28, 2020
Updated jisaw#10 to current parameters, and a working version.
HarshitGupta865
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Oct 15, 2022
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There are more exercises for SUM, COUNT, etc. functions. This solution was missing so I wrote that.