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<p>表:<code>Logs</code></p>
<pre>
+-------------+---------+
| Column Name | Type |
+-------------+---------+
| id | int |
| num | varchar |
+-------------+---------+
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在 SQL 中id 是该表的主键。
id 是一个自增列。</pre>
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<p>&nbsp;</p>
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<p>找出所有至少连续出现三次的数字。</p>
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<p>返回的结果表中的数据可以按 <strong>任意顺序</strong> 排列。</p>
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<p>结果格式如下面的例子所示:</p>
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<p>&nbsp;</p>
<p><strong>示例 1:</strong></p>
<pre>
<strong>输入:</strong>
Logs 表:
+----+-----+
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| id | num |
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+----+-----+
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 2 |
| 7 | 2 |
+----+-----+
<strong>输出:</strong>
Result 表:
+-----------------+
| ConsecutiveNums |
+-----------------+
| 1 |
+-----------------+
<strong>解释:</strong>1 是唯一连续出现至少三次的数字。</pre>