Oracle 按每天,每周,每月,每季度,每年查询统计数据详解编程语言

//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')