Question

我在SQL Server 2008中生成了SQL数据库，如下所示：

CREATE TABLE Client ( 
    ID bigint,
    Code varchar(50),
    ClientID int NOT NULL
);
ALTER TABLE Client 
  ADD CONSTRAINT PK_Client PRIMARY KEY CLUSTERED (ClientID);

CREATE TABLE Company ( 
    ID bigint,
    Description nvarchar(100),
    SubsidiaryOf bigint,
    companyID int NOT NULL,
    FK_Client_Company int,
    PK_Company int
);
ALTER TABLE Company 
  ADD CONSTRAINT PK_Company PRIMARY KEY CLUSTERED (companyID);

ALTER TABLE Company 
  ADD CONSTRAINT (ID = ID) FOREIGN KEY (FK_Client_Company) 
      REFERENCES Client (ClientID);

ALTER TABLE Company 
  ADD CONSTRAINT (SubsidiaryOf = ID) FOREIGN KEY (PK_Company) 
      REFERENCES Company (companyID);

CREATE TABLE ContactData ( 
    ID bigint,
    LocationID bigint,
    Contact nvarchar(50),
    contactDataID int NOT NULL,
    PK_Location int
);
ALTER TABLE ContactData 
  ADD CONSTRAINT PK_ContactData PRIMARY KEY CLUSTERED (contactDataID);

ALTER TABLE ContactData 
  ADD CONSTRAINT (LocationID = ID) FOREIGN KEY (PK_Location) 
      REFERENCES Location (locationID);


CREATE TABLE Location ( 
    ID bigint,
    CompanyID bigint,
    Country nvarchar(50),
    ZIPCode nvarchar(50),
    locationID int NOT NULL,
    PK_Company int
);
ALTER TABLE Location 
   ADD CONSTRAINT PK_Location PRIMARY KEY CLUSTERED (locationID);

ALTER TABLE Location 
   ADD CONSTRAINT (CompanyID = ID) FOREIGN KEY (PK_Company) 
       REFERENCES Company (companyID);

并希望删除所有ID为＆gt的公司; 140000（其他表中的相关行）。我在一个事务中尝试了一些INNER JOIN的组合，但是FK_Client_Company约束仍然存在问题。任何人都可以帮助我吗？

还有一件事 - 我无法添加任何内容/修改数据库结构/约束。它必须是一个基于查询的解决方案。

Answer 1

首先删除这些公司的客户

    delete client where id in (select fk_client_company from company where id > 140000)

之后，您应该能够在公司表

上运行delete语句

    delete company where id > 140000

我'确定'这是你正在寻找的答案，但我不是100％肯定，因为你的命名方案似乎有点奇怪。我假设company.fk_client_company = client.id。

SQL Server 2008 - 删除具有FK约束的行

1 个答案: