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')

转载自：http://blog.csdn.net/u011659172/article/details/40186009