在一个SQL查询中选择最大值和最小值

Question

I have a table with (id, value) and I would like to get the max and min values for each id. I have used the following without success since I got the same max and min values for every id:

select  max(value) as valmax,
        min(value) as valmin
from mytable

Any ideas?

Answer 1

I think you find below query

select id,  max(value) as valmax,
        min(value) as valmin
from mytable group by id

Just add group by id in your query