獲取最大和最小的時間段

Question

有表

我希望得到分鐘，每天最多的時間段，

感謝

Answer 1

嘗試：

select date(event_start), min(time(event_start)), max(time(event_start)) from t 
group by date(event_start) 
order by date(event_start) 

Answer 2

嘗試是這樣的

Rexter Sample

select DATE_FORMAT(event_start, '%Y-%m-%d') as date1 
,min(DATE_FORMAT(event_start,'%H:%i:%s')) as min1 
,max(DATE_FORMAT(event_start,'%H:%i:%s')) as max1 
from your_table 
group by DATE_FORMAT(event_start, '%Y-%m-%d') 

Answer 3

使用CAST()。

查詢

select cast(event_start as date) `date`, 
min(cast(event_start as time)) `min_time`, 
max(cast(event_start as time)) `max_time` 
from `your_table_name` 
group by cast(event_start as date);