Leetcode 180 Consecutive numbers (2022.06.29)

surface ：Logs

±------------±--------+
| Column Name | Type |
±------------±--------+
| id | int |
| num | varchar |
±------------±--------+
id It's the primary key of this table .

Write a SQL Inquire about , Find all numbers that appear at least three times in a row .

The data in the returned result table can be displayed by In any order array .

The query result format is shown in the following example ：

Example 1:

Input ：
Logs surface ：
±—±----+
| Id | Num |
±—±----+
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 2 |
| 7 | 2 |
±—±----+
Output ：
Result surface ：
±----------------+
| ConsecutiveNums |
±----------------+
| 1 |
±----------------+
explain ：1 Is the only number that appears at least three times in a row .

source ： Power button （LeetCode）
link ：https://leetcode.cn/problems/consecutive-numbers

Method 1 ： Use DISTINCT

MySQL Submission ：

# Write your MySQL query statement below
SELECT DISTINCT
    l1.Num AS ConsecutiveNums
FROM
    Logs l1,
    Logs l2,
    Logs l3
WHERE
    l1.Id = l2.Id - 1
    AND l2.Id = l3.Id - 1
    AND l1.Num = l2.Num
    AND l2.Num = l3.Num
;