从不同的表中删除重复项 - 基于条件

Question

上午

我需要删除基于3个字段匹配的重复项。我根据一个标准编写了一行代码，但需要添加更多代码。

我的代码：

DoCmd.RunSQL ("DELETE tbl_Added.*, tbl_Added.[NUM_CUST]FROM tbl_Added WHERE (((tbl_Added.[NUM_CUST]) In (Select tbl_Removed.[NUM_CUST] from tbl_Removed)));")

我想添加的额外字段名称是： - NeedType - CrackID

感谢任何帮助

更新 我也在尝试下面的VBA无济于事

DoCmd.RunSQL ("DELETE tbl_Added.*, tbl_Added.[NUM_CUST],tbl_Added.[ID_CRAC] FROM tbl_Added WHERE (((tbl_Added.[NUM_CUST],tbl_Added.[ID_CRAC]) In (Select tbl_Removed.[NUM_CUST], tbl_Removed.[ID_CRAC] from tbl_Removed)));")

Answer 1

以下SQL将返回基于您提到的三个字段相等的重复记录的NUM_CUST字段：

SELECT NUM_CUST 
FROM tbl_added 
GROUP BY NUM_CUST, NEEDTYPE, CRACKID 
HAVING Count(NUM_CUST) > 1

从这里开始，您需要决定是否要从表中删除所有此类记录，或仅删除重复记录，保留每个记录的单个实例。