LeetCode OJ Consecutive Numbers
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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.
select distinct a.num from Logs a, Logs b, Logs c where a.id = b.id + 1 and b.id = c.id + 1 and a.num = b.num and b.num = c.num;
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