MySql中按周 月統計數量

經需求要求對某個表進行按每週、每月統計報表顯示，以下為sql

1、按周統計資料:

select

date_format( createdate, 
'%y-%u
') as week,
date_format(date_sub( createdate, interval dayofweek( createdate )- 2 day ),'
%y-%m-%d
') as createdate,
count(*) as count 
from
gyl_order 
group by
week;

日期欄位為每週的周一

2、按月統計資料:

select

date_format( createdate, 
'%y-%m
') as month,
date_format( createdate, 
'%y-%m-01
') as createdate,
count(*) as count 
from
gyl_order 
group by
month;

日期欄位為每月的1號

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