Consecutive Numbers
<p>Table: <code>Logs</code></p>

<pre>
+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| id          | int     |
| num         | varchar |
+-------------+---------+
In SQL, id is the primary key for this table.
id is an autoincrement column starting from 1.
</pre>

<p>&nbsp;</p>

<p>Find all numbers that appear at least three times consecutively.</p>

<p>Return the result table in <strong>any order</strong>.</p>

<p>The&nbsp;result format is in the following example.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> 
Logs table:
+----+-----+
| id | num |
+----+-----+
| 1  | 1   |
| 2  | 1   |
| 3  | 1   |
| 4  | 2   |
| 5  | 1   |
| 6  | 2   |
| 7  | 2   |
+----+-----+
<strong>Output:</strong> 
+-----------------+
| ConsecutiveNums |
+-----------------+
| 1               |
+-----------------+
<strong>Explanation:</strong> 1 is the only number that appears consecutively for at least three times.
</pre>
Database
# Write your MySQL query statement below
SELECT DISTINCT l2.num AS ConsecutiveNums
FROM
    Logs AS l1
    JOIN Logs AS l2 ON l1.id = l2.id - 1 AND l1.num = l2.num
    JOIN Logs AS l3 ON l2.id = l3.id - 1 AND l2.num = l3.num;
