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180.連續出現的數字

SQL架構

編寫一個 SQL 查詢,查詢所有至少連續出現三次的數字。

+----+-----+
| Id | Num |
+----+-----+
| 1  |  1  |
| 2  |  1  |
| 3  |  1  |
| 4  |  2  |
| 5  |  1  |
| 6  |  2  |
| 7  |  2  |
+----+-----+

例如,給定上面的 Logs 表, 1 是唯一連續出現至少三次的數字。

+-----------------+
| ConsecutiveNums |
+-----------------+
| 1               |
+-----------------+

# Write your MySQL query statement below SELECT DISTINCT L1.Num as ConsecutiveNums FROM Logs L1, Logs L2, Logs L3 WHERE L2.Id = L1.Id + 1 AND L3.Id = L2.Id + 1 AND L1.Num = L2.Num AND L2.Num = L3.Num