Sql 如何删除重复项并更新“一对多”相关表？

我已经搜索过了，也许我问的问题不对

我继承了一个令人讨厌的数据库，并试图将其正常化。 我把一张桌子分成两张：业主和建筑物 现在我有两张一对一的桌子

我知道如何删除所有者表中的重复记录，但不知道如何更新一对多相关表

我有一个桌子所有者和一个桌子所有者一对多

所有者表架构：

CREATE TABLE
    [dbo].[tbl_BuildingOwners]
(
    [OwnerID] [int] IDENTITY(1,1) NOT NULL,
    [OwnerName] [nvarchar](255) NULL,
    [OwnerAddress1] [nvarchar](255) NULL,
    [OwnerAddress2] [nvarchar](255) NULL,
    [OwnerAddress3] [nvarchar](255) NULL,
    [OwnerCity] [nvarchar](255) NULL,
    [OwnerState] [nvarchar](255) NULL,
    [OwnerZip] [float] NULL,
    [OwnerZipExt] [float] NULL,
    [OwnerPhone] [nvarchar](255) NULL,
    [OwnerFax] [nvarchar](255) NULL
)

CREATE TABLE
    [dbo].[BuildingOwnerID]
(
    [OwnerRelationshipID] [int] IDENTITY(1,1) NOT NULL,
    [OwnerID] [int] NOT NULL,
    [FileNumber] [nvarchar](255) NOT NULL
)

Ownersone到Buildingsmany关系表架构：

CREATE TABLE
    [dbo].[tbl_BuildingOwners]
(
    [OwnerID] [int] IDENTITY(1,1) NOT NULL,
    [OwnerName] [nvarchar](255) NULL,
    [OwnerAddress1] [nvarchar](255) NULL,
    [OwnerAddress2] [nvarchar](255) NULL,
    [OwnerAddress3] [nvarchar](255) NULL,
    [OwnerCity] [nvarchar](255) NULL,
    [OwnerState] [nvarchar](255) NULL,
    [OwnerZip] [float] NULL,
    [OwnerZipExt] [float] NULL,
    [OwnerPhone] [nvarchar](255) NULL,
    [OwnerFax] [nvarchar](255) NULL
)

CREATE TABLE
    [dbo].[BuildingOwnerID]
(
    [OwnerRelationshipID] [int] IDENTITY(1,1) NOT NULL,
    [OwnerID] [int] NOT NULL,
    [FileNumber] [nvarchar](255) NOT NULL
)

我需要删除BuildingOwners表中的重复项，并将BuildingOwnerID表中的OwnerID更新为BuildingOwners表中保留的不同OwnerID

我希望这是有道理的

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但不能让它为我工作。最后，我可以使用SQL Server或MS Access，这两种方法都更简单。

要删除重复项，您可以使用下面的查询示例查询删除重复的状态项[按国家和州重复]

WITH    dupDel
          AS ( SELECT   ROW_NUMBER() OVER ( PARTITION BY country, STATE ORDER BY country ) AS RowNum
               FROM     tblTest
             )
    DELETE  FROM dupDel
    WHERE   RowNum > 1

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@Diana现在您需要修改哪个ID。。。还是更新。。。？