无法通过行号获取记录

Question

我在此查询中收到错误

select ID, ROW_NUMBER() OVER(ORDER BY ID) as num from T_TASK where ROW_NUMBER() = 5

和这一个

select ID, ROW_NUMBER() OVER(ORDER BY ID) as num from T_TASK where num = 4

查询有什么问题？

Answer 1

使用子查询：

SELECT ID
FROM (
    SELECT ID, ROW_NUMBER() OVER(ORDER BY ID) AS num
    FROM T_TASK
) T1 WHERE num = 5

Answer 2

SELECT ID
FROM
(select ID, ROW_NUMBER() OVER(ORDER BY ID) as rownum from T_TASK) dr
WHERE rownum = 5

Answer 3

1您不能直接在WHERE子句上使用Windows函数

2同样适用于别名