oracle 实现按天,周,月,季度,年查询统计数据
//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')
