09 2019 档案

LeetCode 1127.User Purchase Platform
摘要：Table: Spending Write an SQL query to find the total number of users and the total amount spent using mobile only, desktop only and both mobile and de 阅读全文
posted @ 2019-09-28 23:42 一拳Coder 阅读(701) 评论(0) 推荐(0)
LeetCode 1097. Game Play Analysis V
摘要：1、题目描述 We define the install date of a player to be the first login day of that player.We also define day 1 retention of some date X to be the number 阅读全文
posted @ 2019-09-28 00:57 一拳Coder 阅读(548) 评论(0) 推荐(0)