题解 | 支付间隔平均值
支付间隔平均值
https://www.nowcoder.com/practice/847431ad931e45348eb1ab5657144c28
select cast(round(avg(abs(timestampdiff(second,o.logtime,s.logtime))),0) as signed) gap from order_log o inner join select_log s using(order_id); round没办法消除小数位的浮点数，我觉得还是要先四舍五入所以还是加了round，最后套上cast去除浮点数
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