Sql server 删除重复项，但SQL Server中只保留日期较旧的项

我有一个名为

dbo.Inbox

的表，它有4列：

[Id]

，

[UserId]

，

[Email]

，

[CreationDate]

我正在使用以下SQL查询删除

[UserId]

和

[Email]

相同的行。但是，它会删除具有较旧的

[CreationDate]

的行

WITH cte AS (
            SELECT
                Id,
                UserId,
                Email,
                ROW_NUMBER() OVER(
                    PARTITION BY
                        UserId,
                        Email
                    ORDER BY
                        UserId,
                        Email
                ) row_num
             FROM
                Inbox
        )
        DELETE FROM cte
        WHERE row_num > 1; 

---

我应该如何更改上述查询，以便在删除重复的行时，只保留较旧的

[CreationDate]

行？

您需要按CreationDate降序排列行：

WITH cte AS (
            SELECT
                Id,
                UserId,
                Email,
                ROW_NUMBER() OVER(
                    PARTITION BY
                        UserId,
                        Email
                    ORDER BY
                        CreationDate DESC
                ) row_num
             FROM
                Inbox
        )
        DELETE FROM cte
        WHERE row_num > 1;