oracle 按每天,每周,每月,每季度,每年查詢統計數據
//按天統計
select count(dataid) as 每天操作數量, sum()
from tablename
group by trunc(createtime, 'DD'))
//按自然周統計
select to_char(date,'iw'),sum()
from tablename
group by to_char(date,'iw')
//按自然月統計
select to_char(date,'mm'),sum()
from tablename
group by to_char(date,'mm')
//按季統計
select to_char(date,'q'),sum()
from tablename
group by to_char(date,'q')
//按年統計
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,每年查詢統計數據
來源本人博客：http://yijianfengvip.blog.163.com/blog/static/1752734322011112294145188/