oracle 按每天,每周,每月,每季度,每年查询统计数据

//按天统计

select count(dataid) as 每天操作数量, sum()

from tablename

group by trunc(createtime, 'DD'))

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

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

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

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