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 above Logs table, 1 is the only number that appears consecutively for at least three times.
+-----------------+ | ConsecutiveNums | +-----------------+ | 1 | +-----------------+
1 # Write your MySQL query statement below 2 SELECT DISTINCT a.num AS ConsecutiveNums 3 FROM Logs AS a, Logs AS b, Logs AS c 4 WHERE a.num = b.num AND b.num = c.num AND a.id + 1 = b.id AND b.id + 1 = c.id
