//按天统计

select count(dataid) as 每天操作数量, sum()

from

where

group by trunc(createtime, 'DD'))

//按自然周统计?
select to_char(date,'iw'),sum()?
from?
where?
group by to_char(date,'iw')?

//按自然月统计?
select to_char(date,'mm'),sum()?
from?
where?
group by to_char(date,'mm')?

//按季统计?
select to_char(date,'q'),sum()?
from?
where?
group by to_char(date,'q')?

//按年统计?
select to_char(date,'yyyy'),sum()?
from?
where?
group by to_char(date,'yyyy')