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')

oracle 按每天,每周,每月,每季度,每年查询统计数据

来源本人博客：http://yijianfengvip.blog.163.com/blog/static/1752734322011112294145188/