题解 | #广告点击的高峰期#
广告点击的高峰期
https://www.nowcoder.com/practice/6756d65784f9413b8505c1d0c6754b3a
select
hour(click_time) as click_hour,
count(click_time) as click_cnt
from
user_ad_click_time
group by hour(click_time)
order by count(click_time) desc
limit 1
