Question

这是我的db脚本，

CREATE TABLE [dbo].[MyTable](
[ID] [int] IDENTITY(1,1) NOT NULL,
[Code] [nvarchar](25) NULL,
[Name] [nvarchar](25) NULL,
[dob] [date] NULL ,
 CONSTRAINT [PK_MyTable] 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]
   ) ON [PRIMARY]

当我插入时，我收到此错误

Cannot insert explicit value for identity column in table 'MyTable' when   
IDENTITY_INSERT is set to OFF.

我该如何解决？

Answer 1

您正在尝试为标识列分配显式值，而不是在插入数据时让数据库为您创建一个。

您正在执行以下操作：

insert into MyTable (Id, Code, Name, dob) VALUES (1, 'XXX', 'xxx', 'xxx', somedate)

而不是

insert into MyTable(Code, Name, dob) VALUES ('xxx', 'xxx', somedate)

Answer 2

根据Rafeel的建议，您无需在insert列中明确Identity个值。但是，如果您删除了一行并希望某行具有相同的ID值。然后你可以做到以下几点：

SET IDENTITY_INSERT MyTable ON

insert into MyTable (Id, Code, Name, dob) 
VALUES (OldIdValue, 'XXX', 'xxx', 'xxx', somedate)

SET IDENTITY_INSERT MyTable OFF

IDENTITY_INSERT设置为OFF？

2 个答案: