获取最大和最小的时间段

Question

有表

我希望得到分钟，每天最多的时间段，

感谢

Answer 1

尝试：

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

尝试是这样的

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()。

查询

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);