Question

我有一个名为Member（唯一ID是MemberID）的表，它有许多成员重复项，只有First和Last Names不同，但是商业名称，地址，城市，州和邮政编码都是相同的。记录是重复导入的。

如何运行脚本来查找BusinessName，Addr1，City，State和ZIP都相同的重复成员。

我想在页面上列出所有内容，因此我可以选择要消除的内容。

我有什么想法可以为此创建脚本吗？

非常感谢，

保

Answer 1

您想为此使用分析函数：

select m.*
from (select m.*,
             count(*) over (partition by BusinessName, Address, City, State, ZipCode) as NumDups 
      from members m
     ) m
where NumDups > 1

NumDups告诉你有多少重复。

Answer 2

select * from Member as m
where exists(select MemberID 
      from Member as m2 
      where 
           (m.BusinessName = m2.BusinessName or (m.BusinessName is null and m2.BusinessName is null)) and 
           (m.Addr1 = m2.Addr1 or (m.Addr1 is null and m2.Addr1 is null)) and 
           (m.City = m2.City or (m.City is null and m2.City is null)) and 
           (m.State = m2.State or (m.State  is null and m2.State is null)) and 
           (m.ZIP = m2.ZIP or (m.ZIP  is null and m2.ZIP is null)) and 
           m.memberID <> m2.MemberID)

使用上述查询，在哪里检查是否存在重复条目。仅当存在MemberID 不匹配的副本时，子查询才会返回结果。这意味着如果有一个唯一的行，那么就没有结果，而如果有一行有一个或多个副本，那么它将被返回。

查找重复的条目SQL

2 个答案: