excel - 如何删除 access 或 excel 中的重复和原始条目（多列）

Question

有没有办法删除所有重复的行和excel或access中的原始条目？
我需要删除匹配 3 列的整行。这是一个视觉效果（底部表格是表格应该成为的样子；在这种情况下，具有相同零件编号、制造商和制造编号的副本 + 原件将被删除）：

Answer 1

这在 Access 中似乎对我有用：

DELETE FROM parts
WHERE EXISTS
(
    SELECT p2.[PART NUMBER], p2.[MANUFACTURER], p2.[MANUFACTURER NUMBER]
    FROM parts p2
    WHERE parts.[PART NUMBER] = p2.[PART NUMBER] 
        AND parts.[MANUFACTURER] = p2.[MANUFACTURER] 
        AND parts.[MANUFACTURER NUMBER] = p2.[MANUFACTURER NUMBER]
    GROUP BY p2.[PART NUMBER], p2.[MANUFACTURER], p2.[MANUFACTURER NUMBER]
    HAVING COUNT(*) > 1
)

当我在我的测试数据上运行它时......

PART NUMBER  MANUFACTURER  QUALITY  MANUFACTURER NUMBER
-----------  ------------  -------  -------------------
123          GORD                1  750                
123          OTHER               3  321                
123          OTHER               4  321                

...它删除了两个“其他”行，但单独留下了“GORD”行。

Answer 2

DELETE * FROM MyTable WHERE PartNumber in (SELECT MyTable.PartNumber
FROM MyTable
GROUP BY MyTable.PartNumber
HAVING (((Sum(1))>1)));

Answer 3

这应该为你做。它检查所有三个字段，并删除原始和所有重复项。

DELETE 
  parts.* 
FROM parts 
WHERE  (( ((SELECT Count (*) 
            FROM   parts AS P 
            WHERE  ( P.partnum & P.manf & P.manfnum = 
                     parts.partnum & parts.manf & parts.manfnum ) 
                   AND ( P.partnum <= parts.partnum ))) > 1 ));