Nobel prize winner database [closed] - mysql

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I have the Nobel prize winners database since the year it was first awarded. The source of the data is : http://www.aggdata.com/awards/nobel_prize_winners
It has one single table, so there is no foreign key nor any ER.
The table has following 12 columns: Id, Year, Category, Name, Birthdate, Birth Place, County, Residence, Role/Affiliate, Field/Language, Prize Name, Motivation.
Obviously there are multiple winners for categories such as physics, medicine etc.
I have been trying to see the number of Nobel prize winners per category per decade using query. I want my result table to look like:
______________________________________________
1960-1969 Peace 9 winners
1960-1969 Physics 19 winners
..............................................
1970-1979 Peace 6 winners
1960-1969 Physics 12 winners
..............................................
______________________________________________
Can this be possible through a query in MySQL?
Much appreciate your attention. Thank you all/

Answer 1

Here is a more SQL way to do this:
select concat(floor(npw.year / 10)*10, '-', floor(npw.year / 10)*10+9) as decade,
npw.category,
count(*) as winners
from NobelPriceWinners npw
group by floor(npw.year / 10), npw.category
order by decade, category;
This produces three columns as:
Decade Category Winners
1960-1969 Peace 9
1960-1969 Physics 19
. . .

Answer 2

Here's some ideas:
Assuming you want to represent the decade as xxx0-xxx9, and assuming the award_date is DATE datatype, you can use an expression to get first three characters of year:
SUBSTR(DATE_FORMAT(t.award_date,'%Y'),1,3)
A query something like this may get you started.
SELECT CONCAT(s.ccy,'0-',s.ccy,'9') AS decade
, s.category
, CONCAT(s.count_winners,' winners') AS winners
FROM (
SELECT SUBSTR(DATE_FORMAT(t.award_date,'%Y'),1,3) AS ccy
, t.category
, COUNT(1) AS count_winners
FROM mytable t
WHERE t.award = 'winner'
GROUP
BY SUBSTR(DATE_FORMAT(t.award_date,'%Y'),1,3)
, t.category
) s
The inline view aliased as s does the heavy lifting to get the result, the outer query does some formatting.
Note that this query does not return any "zero" counts.
If you also need to include "zero" counts, for all categories for all decades, that could be done as well, by introducing a row sources for "all category" and "all decades", and then doing a cross join between those and a left join to the inline view aliased as s.
The query above does not return include "0" count