oracle 按每天,每周,每月,每季度,每年查询统计数据

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')