Question

我正在查看所有表格的SSMS生成脚本，我注意到了这一点：

/****** Object:  ForeignKey [FK_User__ACRNL__1C722D53]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])
GO
/****** Object:  ForeignKey [FK_User__ACRNL__1D66518C]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])
GO
/****** Object:  ForeignKey [FK_User__ACRNL__1E5A75C5]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])
GO
/****** Object:  ForeignKey [FK_User__ACRNL__4EFDAD20]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])
GO
/****** Object:  ForeignKey [FK_User__ACRNL__4FF1D159]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])
GO
/****** Object:  ForeignKey [FK_User__ACRNL__50E5F592]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])
GO
/****** Object:  ForeignKey [FK_User_ACRNL_7834CCDD]    Script Date: 10/19/2015 16:28:12 ******/
ALTER TABLE [dbo].[User_Funding]  WITH CHECK ADD FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])

从我看到的User_Funding表中的位置有7个外键。

我可以删除其中的6个外键，或者我应该深入挖掘为什么有7个外键？

Answer 1

是。删除除一个以外的所有

您可能正在运行一些SQL来发布更新。它可能是通过FK名称检查FK是否已经存在，但是然后创建一个没有名称的FK，产生随机的＆＃34; _7834CCDD＆＃34;。

将其更改为：

IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK_User_Funding_Location]') AND parent_object_id = OBJECT_ID(N'[dbo].[User_Funding]'))
ALTER TABLE [dbo].[User_Funding]  ADD  CONSTRAINT [FK_User_Funding_Location] FOREIGN KEY([ACRNLocation])
REFERENCES [dbo].[Location] ([location])

＆＃34; ADD CONSTRAINT＆＃34;之后的[FK_User_Funding_Location]确保名称不是随机的。

我已经处理过这个问题，甚至不得不编写一个脚本来删除除了一个之外的所有内容，并将最后一个重命名为非随机的。

删除相同的外键是否安全

1 个答案: