180. 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 | 2 |

| 7 | 2 |

+----+-----+

For example, given the aboveLogstable,1is the only number that appears consecutively for at least three times.

Write your MySQL query statement below

select l1.num from Logs l1, Logs l2, Logs l3 where l1.id-l2.id=1 and l1.num=l2.num and l2.id-l3.id=1 and l2.num=l3.num group by l1.num;