在删除之前将重复记录移动到另一个表答案

【问题标题】：Moving duplicate record to another table before deleting在删除之前将重复记录移动到另一个表
【发布时间】：2016-05-27 13:48:33
【问题描述】：

我发现了这个很棒的代码，它可以删除 SQL Server 表中的重复行。

;WITH x AS 
(
  SELECT col1, col2, col3, rn = ROW_NUMBER() OVER 
      (PARTITION BY col1, col2, col3 ORDER BY id)
  FROM dbo.tbl
)
DELETE x WHERE rn > 1;

现在我想在删除之前将重复记录移动到另一个表。任何帮助将非常感激。谢谢。

【问题讨论】：

只需将delete 更改为select * into [table] from x 或insert into [table] select * from x（显然包括您已经拥有的where）。

标签： sql-server duplicates insert-into

【解决方案1】：

您可以简单地复制粘贴 CTE 并使用它两次：

;WITH x AS 
(
  SELECT col1, col2, col3, rn = ROW_NUMBER() OVER 
      (PARTITION BY col1, col2, col3 ORDER BY id)
  FROM dbo.TableName1
)
INSERT INTO dbo.TableName2
    SELECT columns FROM x WHERE rn > 1;

;WITH x AS 
(
  SELECT col1, col2, col3, rn = ROW_NUMBER() OVER 
      (PARTITION BY col1, col2, col3 ORDER BY id)
  FROM dbo.TableName1
)
DELETE FROM x WHERE rn > 1;

【讨论】：