LeetCode(数据库)- Confirmation Rate

题目链接:点击打开链接题目大意:略。解题思路:略。AC 代码SELECT s.user_id, IFNULL(confirmation_rate, 0) confirmation_rate FROM Signups s LEFT JOIN (SELECT user_id, ROUND(COUNT(I...

[LeetCode] Logger Rate Limiter 记录速率限制器

Design a logger system that receive stream of messages along with its timestamps, each message should be printed if and only if it is not printed in t...

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