I have a table in my database like this :
m | v
-------
1 | 10
1 | 15
1 | 15
2 | 8
2 | 12
2 | 14
3 | 25
3 | 15
3 | 18
4 | 12
I want select maximum of sum v
group by m
and in first step I create table with this code :
select m,sum(v) as v from table group by m
m | v
-------
1 | 35
2 | 34
3 | 54
4 | 12
and for select max in this table my code is :
select max(v) as v,m from
(select sum(v) as v,m from table group by `m`)ta
v | m
------
54 | 1
v | m
------
54 | 3
i haven't any idea for solve this problem.
尝试这个:
select m,sum(v) as v from table group by m ORDER BY v DESC LIMIT 0,1
try this query
SELECT v,m from
(SELECT SUM(v) as v, m FROM maxValues GROUP BY `m`) ta
ORDER BY v DESC
LIMIT 1
尝试这个
(select max(sum(v)), m as v,m from table group by `m`)
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