如何在mysql中為datetime字段編寫Group By查詢

Question

我需要在沒有時間的情況下從表格中的datetime字段開始按日期分組。我可以做什么朋友？

這里我的表字段是，

我的Mysql查詢是，

select *,count(ord_number) as ord from tbl_order_details inner join tbl_users on tbl_users.user_id=tbl_order_details.user_id  where 1=1 group by ord_date order by ord asc

Answer 1

你可以通過DATE（）來做到這一點

示例 -

group by DATE(ord_date)

試試這個

select *,count(ord_number) as ord from tbl_order_details inner join tbl_users on tbl_users.user_id=tbl_order_details.user_id  where 1=1 group by DATE(ord_date) order by ord asc

Answer 2

使用DATE（）函數

select *,count(ord_number) as ord from tbl_order_details inner join 
tbl_users on tbl_users.user_id=tbl_order_details.user_id  where 1=1 
group by DATE(ord_date) order by ord asc