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;
```
