在删除之前将重复记录移动到另一个 table

Question

我发现这段很棒的代码可以删除 SQL 服务器 table 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的记录移动到另一个table。任何帮助将非常感激。谢谢

Answer 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;

在删除之前将重复记录移动到另一个 table

Moving duplicate record to another table before deleting

sql-server

duplicates

insert-into