oracle 按每天,每周,每月,每季度,每年查詢統計數據

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')