MySQL - get sum() of group - php

Question

I have this table similar to MySQL - get sum() grouped max() of group
id | person | score | date | g | b | m |
-----------------------------------------------------------
1 | 32 | 444 | 2011-05 | 0 | 1 | o |
2 | 65 | 528 | 2011-05 | 1 | 0 | 1 |
3 | 77 | 455 | 2011-05 | 0 | 0 | 1 |
4 | 32 | 266 | 2011-05 | 1 | 1 | 0 |
5 | 77 | 100 | 2011-05 | 0 | 0 | 1 |
6 | 77 | 457 | 2011-05 | 1 | 0 | 0 |
7 | 77 | 457 | 2011-05 | 1 | 0 | 1 |
8 | 65 | 999 | 2011-05 | 0 | 0 | 1 |
9 | 32 | 222 | 2011-05 | 0 | 1 | 1 |
The result should be:
person | score | date | g | b | m |
-----------------------------------------------------
32 | 932 | 2012-05 | 1 | 3 | 1 |
66 | 1527 | 2012-05 | 1 | 0 | 2 |
77 | 1469 | 2012-05 | 2 | 0 | 3 |
But I couldn't achieve what I want to. I am trying to get for each person sum of its scores, g, m and b fields in each month. I'm very newbie about subqueries.
Thank you!

Answer 1

You can't just group by month, since the same month can appear in more than one year, so group by year as well, e.g.:
SELECT person, YEAR(`date`), MONTH(`date`),
SUM(score), SUM(b), SUM(g), SUM(m)
FROM MyTable
GROUP BY person, YEAR(`date`), MONTH(`date`)
If your date column is actually not a date type but a varchar or similar, and it contains yyyy-dd as shown, than you can just do:
SELECT person, `date`,
SUM(score), SUM(b), SUM(g), SUM(m)
FROM MyTable
GROUP BY person, `date`