题解 | 统计快递从创建订单到发出间隔时长
统计快递从创建订单到发出间隔时长
https://www.nowcoder.com/practice/be3e56c950724b27aa79b79309147443
select round(avg(timestampdiff(minute, create_time, out_time)/60), 3) as time from express_tb a join exp_action_tb b on a.exp_number=b.exp_number
查看9道真题和解析