Question

我正在尝试创建复合外键关系/约束。所有表都是空的。我有这张桌子：

CREATE TABLE [dbo].[ChemSampleValueTest](
    [SampleNumber] [int] NOT NULL,
    [ParameterID] [int] NOT NULL,
    [Value] [numeric](18, 6) NOT NULL,
    [Accuracy] [varchar](50) NULL,
    [ResultGroupID] [int] NOT NULL,
    [QAState] [nvarchar](32) NOT NULL,
     CONSTRAINT [PK_SampleValueTest] PRIMARY KEY CLUSTERED 
    (
        [SampleNumber] ASC,
        [ParameterID] ASC,
        [ResultGroupID] ASC
    )
) ON [PRIMARY]

和这张表：

CREATE TABLE [dbo].[ChemSampleValueEventLinkTest](
    [Event] [int] NOT NULL,
    [SampleNumber] [int] NOT NULL,
    [ResultGroupID] [int] NOT NULL,
    [ParameterID] [int] NOT NULL,
    [QAState] [nvarchar](32) NULL
) ON [PRIMARY]

我希望将它们链接起来：

alter table [ChemSampleValueEventLinkTest] add 
    constraint FK_ChemSampleValueEvent_ChemSampleValue_test
    foreign key ([SampleNumber], [ResultGroupID], [ParameterID]) 
    references ChemSampleValueTest ([SampleNumber], [ResultGroupID], [ParameterID])

据我所知，所有列类型都相同，但它一直在说

引用的表中没有主键或候选键 'ChemSampleValueTest'与外键中的引用列列表匹配 'FK_ChemSampleValueEvent_ChemSampleValue_test'。

我哪里错了？

Answer 1

看起来您需要按照它们在PK定义中出现的顺序来显示您的FK /引用列表。

这应该有效：

CREATE TABLE [dbo].[ChemSampleValueTest](
    [SampleNumber] [int] NOT NULL,
    [ParameterID] [int] NOT NULL,
    [Value] [numeric](18, 6) NOT NULL,
    [Accuracy] [varchar](50) NULL,
    [ResultGroupID] [int] NOT NULL,
    [QAState] [nvarchar](32) NOT NULL,
     CONSTRAINT [PK_SampleValueTest] PRIMARY KEY CLUSTERED 
    (
        [SampleNumber] ASC,
        [ParameterID] ASC,
        [ResultGroupID] ASC
    )
) ON [PRIMARY]

CREATE TABLE [dbo].[ChemSampleValueEventLinkTest](
    [Event] [int] NOT NULL,
    [SampleNumber] [int] NOT NULL,
    [ResultGroupID] [int] NOT NULL,
    [ParameterID] [int] NOT NULL,
    [QAState] [nvarchar](32) NULL
) ON [PRIMARY]

alter table [ChemSampleValueEventLinkTest] add 
    constraint FK_ChemSampleValueEvent_ChemSampleValue_test
    foreign key ([SampleNumber], [ParameterID], [ResultGroupID]) 
    references ChemSampleValueTest ([SampleNumber], [ParameterID], [ResultGroupID])

创建复合外键约束

1 个答案: