MYSQL query to get records with value that increased most between two dates
I have a MySQL table ScoreArchive
with following fields:
ID
(int), primary key
Date
(date)
Score
(int)
I record in the table the Score
of each ID
every day.
Now I wish to find the IDs that have the top score increase between, for example, 2011-开发者_Go百科04-22 and 2011-05-31.
How can I find these using a MySQL query?
Try something like:
select id, max(score) - min(score) as diff ... group by id order by diff desc
Edit (following up on the comment):
Or something like:
select id, final_scores.score - start_scores.score as diff
from (
select id, min(date) as min_date, max(date) as max_date
from scores
where date between ...
group by id
) as ranges
join scores as final_scores
on final_scores.date = ranges.min_date
join scores as start_scores
on start_scores.date = ranges.max_date
where ...
order by diff desc
SELECT score FROM ScoreArchive WHERE date BETWEEN 2011-04-22 AND 2011-05-31 ORDER BY score DESC;
That's how i would do it in pgsql i am guessing that mysql is the same
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