Question

您好我正在尝试根据ROW_NUMBER（）函数查询数据。

SELECT ROW_NUMBER() OVER(ORDER BY Id) AS CountRow,
ProductId, ProductName, Tracklink, ProductImage, TrackPrice FROM ProductDetails;

我的行包含CountRow列中的数字。现在我想查询这个Alias以查找例如31到40之间的行。但是我收到一条错误，说CountRow不存在。

我如何克服这个问题？

感谢....

Answer 1

您无法在WHERE子句中引用别名。将它包装在子查询中，你会没事的：

select *
from
(
    SELECT ROW_NUMBER() OVER(ORDER BY Id) AS CountRow,
    ProductId, ProductName, Tracklink, ProductImage, TrackPrice FROM ProductDetails
) a
where CountRow between 31 and 40

Answer 2

如果您的DBMS支持cte，您可以这样做：

;WITH CTE
(
    SELECT 
        ROW_NUMBER() OVER(ORDER BY Id) AS CountRow,
        ProductId, 
        ProductName, 
        Tracklink, 
        ProductImage, 
        TrackPrice 
    FROM 
        ProductDetails
)
SELECT
    *
FROM
    CTE
WHERE
    CTE.CountRow between 31 and 40

Answer 3

SELECT * FROM (SELECT ROW_NUMBER() OVER(ORDER BY Id) AS CountRow,
ProductId, ProductName, Tracklink, ProductImage, TrackPrice FROM ProductDetails) AS A
WHERE CountRow BETWEEN 31 AND 40

希望这有帮助。

从ROW_NUMBER结果中查询数据

3 个答案: