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')