题解 | 短视频直播间晚上11-12点之间各直播间的在线人数

with T1 as (
    select * 
    from user_view_tb u 
    where (u.in_time between '23:00:00' and '23:59:59')
    or (u.out_time between '23:00:00' and '23:59:59')
)
select t.room_id as room_id, r.room_name as room_name,  count(distinct t.user_id) as user_count
from T1 t left join room_info_tb r on t.room_id=r.room_id
group by room_id,room_name;