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,t1.create_time,t2.out_time)/60),3) as time from express_tb t1 left join exp_action_tb t2 on t1.exp_number = t2.exp_number
