思考的陈
思考的陈
全部文章
题解
归档
标签
去牛客网
登录
/
注册
KEY TO EXERCISES
全部文章
/ 题解
(共5篇)
内连接即可
SELECT a.date,ROUND(have/sum,3) AS 'p' FROM (SELECT date,COUNT(*) AS 'have' FROM email WHERE type='no_completed' AND send_id NOT IN (SELECT id FROM ...
Mysql
2021-10-02
0
221
BST判定
修改了楼上题解的辅助方法check import java.util.*; class TreeNode{ int val; TreeNode left=null,right=null; TreeNode(int val){ this.val=val;} } public c...
Java
2021-09-11
0
393
牛客的课程订单分析(六)
SELECT o.id,is_group_buy,name AS 'client_name' FROM order_info o LEFT JOIN client c ON o.client_id=c.id WHERE user_id IN (SELECT user_id FROM order_...
Mysql
2021-08-29
0
285
牛客的课程订单分析(三)
击败92,代码相对简洁点 SELECT * FROM order_info WHERE user_id IN (SELECT user_id FROM order_info WHERE status='completed' AND date>'2025-10-15' AND produc...
Sqlite
2021-08-20
0
394
牛客的课程订单分析(二)
SELECT DISTINCT(t1.user_id) FROM order_info t1 JOIN (SELECT user_id ,COUNT(user_id) AS 'count' FROM order_info WHERE status='compl...
Mysql
2021-08-02
0
268