刪除SQL Server級聯

我正在使用SQL Server 2016並試圖在刪除上實現級聯。它確實有效，但如果我把代碼放在一個單獨的腳本中就行不通了。將約束放在--subproject人和--activity然後再次添加約束的代碼必須位於單獨的文件中。刪除SQL Server級聯

因此，這是在一個文件中

ALTER TABLE dbo.SubProjectPerson 
    DROP CONSTRAINT SubProjectPerson_SubProject

，這是在另一個文件

ALTER TABLE dbo.SubProjectPerson 
    ADD CONSTRAINT SubProjectPerson_SubProject 
     FOREIGN KEY (SubProjectID) 
     REFERENCES dbo.SubProject(SubProjectID) 
     ON DELETE CASCADE;

這就是它的工作原理

這裏的唯一途徑是，我有

腳本

BEGIN TRY 
BEGIN TRANSACTION 
    --subproject person 
    ALTER TABLE dbo.SubProjectPersonRole 
     DROP CONSTRAINT SubProjectPersonRole_SubProjectPerson 

    ALTER TABLE dbo.SubProjectPersonRole 
     ADD CONSTRAINT SubProjectPersonRole_SubProjectPerson 
      FOREIGN KEY (SubProjectPersonID) 
      REFERENCES dbo.SubProjectPerson(SubProjectPersonID) 
      ON DELETE CASCADE; 

    ALTER TABLE dbo.SubProjectPerson 
     DROP CONSTRAINT SubProjectPerson_SubProject 

    ALTER TABLE dbo.SubProjectPerson 
     ADD CONSTRAINT SubProjectPerson_SubProject 
      FOREIGN KEY (SubProjectID) 
      REFERENCES dbo.SubProject(SubProjectID) 
      ON DELETE CASCADE; 

    --activity 
    ALTER TABLE dbo.Activity 
     DROP CONSTRAINT Activity_SubProject 

    ALTER TABLE dbo.Activity 
     ADD CONSTRAINT Activity_SubProject 
      FOREIGN KEY (SubProjectID) 
      REFERENCES dbo.SubProject(SubProjectID) 
      ON DELETE CASCADE; 

    --subproject 
    ALTER TABLE dbo.SubProjectDocument 
     DROP CONSTRAINT SubProjectDocument_SubProject 

    ALTER TABLE dbo.SubProjectDocument 
     ADD CONSTRAINT SubProjectDocument_SubProject 
      FOREIGN KEY (SubProjectID) 
      REFERENCES dbo.SubProject(SubProjectID) 
      ON DELETE CASCADE; 

    ALTER TABLE dbo.SubProjectNote 
     DROP CONSTRAINT SubProjectNote_SubProject 

    ALTER TABLE dbo.SubProjectNote 
     ADD CONSTRAINT SubProjectNote_SubProject 
      FOREIGN KEY (SubProjectID) 
      REFERENCES dbo.SubProject(SubProjectID) 
      ON DELETE CASCADE; 

    --communication thread 
    ALTER TABLE dbo.CommunicationThread 
     DROP CONSTRAINT CommunicationThread_SubProjectID 

    ALTER TABLE dbo.CommunicationThread 
     ADD CONSTRAINT CommunicationThread_SubProjectID 
      FOREIGN KEY (SubProjectID) 
      REFERENCES dbo.SubProject(SubProjectID) 
      ON DELETE CASCADE; 

    COMMIT TRANSACTION 
END TRY 
BEGIN CATCH 
    ROLLBACK TRANSACTION 
END CATCH

這個長的腳本運行正常，沒有錯誤，但沒有改變被選中這兩個表，除非我在單獨的文件中運行它們。這裏有什麼問題？

來源

2016-10-26 Ortho Home Defense

在你所有的'alter'語句之後你不需要分號嗎？ – Beth

不，這並不能改變什麼，我不得不拆分此成3個腳本爲它工作 –

嘗試添加打印語句，看看哪一個是沒有得到執行。例如：打印1 ALTER TABLE SubProjectPersonRole DROP約束SubProjectPersonRole_SubProjectPerson print 1 – James

試試這個。每個陳述都使用GO。

ALTER TABLE dbo.SubProjectDocument 
DROP CONSTRAINT SubProjectDocument_SubProject 

GO 
ALTER TABLE dbo.SubProjectDocument 
ADD CONSTRAINT SubProjectDocument_SubProject 
FOREIGN KEY (SubProjectID) 
REFERENCES dbo.SubProject(SubProjectID) 
ON DELETE CASCADE;

來源

2016-10-27 06:31:34 Mansoor

刪除SQL Server級聯

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