创建复合外键约束

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]

和这个表:

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]

我想像这样链接他们:

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

据我所知,所有列类型都是相同的,但它一直在说

引用表'ChemSampleValueTest'中没有主键或候选键与外键'FK_ChemSampleValueEvent_ChemSampleValue_test'中的引用列列表匹配.

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.

这应该工作:

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])