在sqlite

Question

我正在尝试查找与其上方至少两个值相同的值。请看一下。

id       number
1        2
2        6
3        7
4        7
5        7
6        1
7        2
8        4
9        7

所以在这种情况下，select会返回：

ID      NUMBER
3        7
4        7
5        7

Answer 1

您可以使用correlated subquery

在其他行中查找值

SELECT *
FROM MyTable
WHERE number = (SELECT number
                FROM MyTable AS T2
                WHERE T2.id = MyTable.id - 1)
  AND number = (SELECT number
                FROM MyTable AS T2
                WHERE T2.id = MyTable.id - 2);