Question

这是主表：

CREATE TABLE [dbo].[Control_cReport](
    [ReportKey] [int] IDENTITY(10000,1) NOT NULL,
    [ReportTechKey] [int] NOT NULL,
    [ProcessKey] [int] NULL,
 CONSTRAINT [PK_Control_cReport] PRIMARY KEY CLUSTERED 
(
    [ReportKey] 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

ALTER TABLE [dbo].[Control_cReport]  WITH CHECK ADD CONSTRAINT [FK_Control_cReport_cReportTech] FOREIGN KEY([ReportTechKey])
REFERENCES [dbo].[Control_cReportTech] ([ReportTechKey])
GO

ALTER TABLE [dbo].[Control_cReport] CHECK CONSTRAINT [FK_Control_cReport_cReportTech]
GO

ALTER TABLE [dbo].[Control_cReport] ADD  DEFAULT ((12)) FOR [ProcessKey]
GO

这是次要表：

CREATE TABLE [dbo].[Control_cReportTech](
    [ReportTechKey] [int] NOT NULL,
    [ReportTechDescription] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK__Control_cReportTech] PRIMARY KEY CLUSTERED 
(
    [ReportTechKey] 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

然后我添加到辅助表中：

INSERT INTO [WHAnalysis].[dbo].Control_cReportTech  
VALUES  
    (1,'Excel Macros'),
    (2,'VB Script'),
    (3,'PDF'),
    (4,'Batch')

现在我试图通过这个INSERT将旧表中的一些数据导入主表：

INSERT INTO [WHAnalysis].[dbo].[Control_cReport]
SELECT
    [ProcessKey] = 12,
    [ReportTechKey] = 1
FROM WHAnalysis.dbo.Controltb_ReportingScheduler_jq

我收到此错误：

消息547，级别16，状态0，行1 INSERT语句冲突使用FOREIGN KEY约束“FK_Control_cReport_cReportTech”。该数据库“WHAnalysis”表中发生冲突 “dbo.Control_cReportTech”，列“ReportTechKey”。声明有已被终止。

Answer 1

问题是因为您试图在INSERT字段中ProcessKey Control_cReportTech INSERT表中不存在的值。

我会更改INSERT语句，以指定您尝试INSERT INTO [Control_cReport] (ProcessKey, ReportTechKey) SELECT 12 as ProcessKey, 1 as ReportTechKey; FROM WHAnalysis.dbo.Controltb_ReportingScheduler_jq;的字段：

请参阅SQL Fiddle With Demo

使用上述查询而不是当前查询，因为未指定列时，它会尝试按表结构的顺序插入值。因此，它试图在ReportTechKey列中插入违反外键的值{{1}}。

最好指定要插入数据的列的顺序。

为什么会出现外键冲突

1 个答案: