表中排名前1的不同行

Question

ID Username     ModifiedDate

1  A.BEENA     2009-12-07 04:48:17.980
2  A.BEENA     2009-11-17 06:02:27.443
3  Abhilash    2009-12-07 04:48:17.980
4  abhilash.r  2009-12-07 04:48:17.980
5  AJI         2009-11-17 06:02:27.443
6  haris       2009-12-07 04:48:17.980
7  haris       2009-11-17 06:02:27.443

我想通过ModifiedDate选择所有不同用户订单的详细信息.

我需要像这样的输出

   1 A.BEENA      2009-12-07 04:48:17.980
   3 Abhilash     2009-12-07 04:48:17.980
   4 abhilash.r   2009-12-07 04:48:17.980
   5 AJI          2009-11-17 06:02:27.443
   6 haris        2009-12-07 04:48:17.980

请帮我

Answer 1

使用以下查询:

WITH CTE (DuplicateCount,Username,ModifiedDate) AS
(
    SELECT
        ROW_NUMBER() OVER (PARTITION BY Username ORDER BY ModifiedDate DESC) AS DuplicateCount,
        Username,
        ModifiedDate
    FROM YourTable
)
SELECT *
FROM CTE
WHERE DuplicateCount = 1