MySQL分组根据创建时间降序排序得不出理想效果,为什么?
根据space_id 分组 ,获取每组时间最大的记录 ,第一条不能得出结果,第二条可以,这是为什么,有没有更好的办法,或者第二条存在什么问题
select * from (select * from t_parking_car_log where car_status=0 and parking_id in ("5da04c5a993237669cf53bb8","5d9c40a9993260be877ab2e1","5da04c5a993237669cf53bb8") order by create_time desc ) t
group by space_id
select * from (select * from t_parking_car_log where car_status=0 and parking_id in ("5da04c5a993237669cf53bb8","5d9c40a9993260be877ab2e1","5da04c5a993237669cf53bb8") order by create_time desc limit 10000000000 ) t
group by space_id