Sql server 2005 唯一约束不存在'；我不想约束任何事情

我有一个名为“模型”的表格，设置如下：

ID-PK，身份

制造商FK-Int32

PriModel FK-Int32

secmodelfk-Int32

FormFactor FK-Int32

活动字符（1）

我希望第2、3、4、5列只接受一组唯一的值。我跑：

ALTER TABLE dbo.Models ADD CONSTRAINT uc_Models UNIQUE (Manufacturer, PriModel, SecModel, FormFactor)

命令报告已成功完成，我看到添加了索引，但没有添加约束。我还能够使用Insert和Update命令创建cols 2-5的副本。我不确定问题是外键还是其他问题

USE [inventory_v2]
GO


    /****** Object:  Table [dbo].[Models]    Script Date: 4/8/2013 2:01:41 PM ******/
    SET ANSI_NULLS ON
    GO

    SET QUOTED_IDENTIFIER ON
    GO

    SET ANSI_PADDING ON
    GO

    CREATE TABLE [dbo].[Models](
        [ID] [int] IDENTITY(1,1) NOT NULL,
        [Manufacturer] [int] NOT NULL,
        [PriModel] [int] NOT NULL,
        [SecModel] [int] NOT NULL,
        [FormFactor] [int] NOT NULL,
        [Active] [char](1) NOT NULL,
     CONSTRAINT [PK_Models] PRIMARY KEY CLUSTERED 
    (
        [ID] ASC
    )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY],
     CONSTRAINT [uc_Models] UNIQUE NONCLUSTERED 
    (
        [Manufacturer] ASC,
        [PriModel] ASC,
        [SecModel] ASC,
        [FormFactor] ASC
    )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
    ) ON [PRIMARY]

    GO

    SET ANSI_PADDING OFF
    GO

    ALTER TABLE [dbo].[Models]  WITH CHECK ADD  CONSTRAINT [FK_Models_Models_FormFactor] FOREIGN KEY([FormFactor])
    REFERENCES [dbo].[Models_FormFactor] ([ID])
    GO

    ALTER TABLE [dbo].[Models] CHECK CONSTRAINT [FK_Models_Models_FormFactor]
    GO

    ALTER TABLE [dbo].[Models]  WITH CHECK ADD  CONSTRAINT [FK_Models_Models_OEMs] FOREIGN KEY([Manufacturer])
    REFERENCES [dbo].[Models_OEMs] ([ID])
    GO

    ALTER TABLE [dbo].[Models] CHECK CONSTRAINT [FK_Models_Models_OEMs]
    GO

    ALTER TABLE [dbo].[Models]  WITH CHECK ADD  CONSTRAINT [FK_Models_Models_PriModels] FOREIGN KEY([PriModel])
    REFERENCES [dbo].[Models_PriModels] ([ID])
    GO

    ALTER TABLE [dbo].[Models] CHECK CONSTRAINT [FK_Models_Models_PriModels]
    GO

    ALTER TABLE [dbo].[Models]  WITH CHECK ADD  CONSTRAINT [FK_Models_Models_SecModels] FOREIGN KEY([SecModel])
    REFERENCES [dbo].[Models_SecModels] ([ID])
    GO

    ALTER TABLE [dbo].[Models] CHECK CONSTRAINT [FK_Models_Models_SecModels]
    GO

---

您确定已正确添加约束吗？你是怎么核实的？请尝试

sp_help Models

，确认“约束”部分列出了新约束，并且该约束是唯一的。否。我查看了短信控制台。它在该部分中被列为唯一的（非聚集）。您的重复值是

null

？否，它们将是{2:2:3:1}。因此，即使已经存在，也允许将{2:2:4:1}更新为{2:2:3:1}。奇怪（显然你为什么要在这里发布！）。如果您将通过“脚本表为…”获得的表定义发布，可能会有所帮助