参考资料: https://leetcode.com/discuss/54463/simple-solution https://leetcode.com/discuss/87854/simple-sql-with-join-1484-ms https://leetcode.com/discuss/69767/two-solutions-inner-join-and-two-variables LeetCode All in One 题目讲解汇总(持续更新中...)...
分析原因,可能与t1.Id = t3.Id - 1条件相关,当t3.Id为0时,-1不会寻找到相关数据,导致sql执行缓慢. 因此,修改为如下所示: # Write your MySQL query statement below # Write your MySQL query statement belowSELECTDISTINCTt1.NumASConsecutiveNumsFROMLogs t1, Logs t2, Logs t3WHEREt2.Id=t1.Id+1AN...
Write a SQL query to find all numbers that appear at least three times consecutively. +---+---+ | Id | Num | +---+---+ | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | | 5 | 1 | | 6 | 2 | | 7 | 2 | +---+---+ For example, given the aboveLogstable,1is...
sql-leetcode Consecutive Numbers 开始想 用 group 把Num都聚在一起 -- Group By语句从英文的字面意义上理解就是“根据(by)一定的规则进行分组(Group)”。 --它的作用是通过一定的规则将一个数据集划分成若干个小的区域,然后针对若干个小区域进行数据处理。但是group by是先排序后分组; 每个部门有多少人: 1 ...
leetcode-Consecutive numbers Write a SQL query to find all numbers that appear at least three times consecutively. +---+---+ | Id | Num | +---+---+ | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | | 5 | 1 | | 6 |...
编写一个SQL查询,查找至少连续出现三次的所有数字。 创建表和数据: 解法: 1.题目暗示,每行的id是连续的。因此,表三次自连接,将连续三行且数字都相等行选出来。 2.抛开id。仅从行数据考虑,需要用户变量记录前一行数据。当前行数据与前一行数据比较是否相同。 定义两个
【Leetcode】Consecutive Numbers https://leetcode.com/problems/consecutive-numbers/ 题目: AI检测代码解析 Write a SQL query to find all numbers that appear at least three times consecutively. +—-+—–+ | Id | Num | +—-+—–+ | 1 | 1 |...
https://leetcode.com/problems/consecutive-numbers/ 难度也只是medium,中等难度,阅读题意,也只是统计一下数字连续出现次数大于3次,例如,1,1,1,2,2,1 在这个序列中,只有1 连续出现了3次,最后显示1 即可,注意排除重复数字,即1 可能 1,1,1,2,2,1,1,1,1,这种情况下,显示一个1即可,在sql语句中添加 di...
Given an integern, returnthe number of ways you can writenas the sum of consecutive positive integers. Example 1: Input:n = 5Output:2Explanation:5 = 2 + 3 Example 2: Input:n = 9Output:3Explanation:9 = 4 + 5 = 2 + 3 + 4 ...
[LeetCode] Consecutive Numbers 连续的数字 Write a SQL query to find all numbers that appear at least three times consecutively. +---+---+ | Id | Num | +---+---+ | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | | 5 |...