Question

我们想使用

设置身份种子

DBCC CHECKIDENT（'myTable'，RESEED，0）

但我们的印象是，必须将运行该代码的服务帐户分配给db_ddladmin角色才能执行此操作。这是真的？如果是这样，由于政策原因，这对我们来说是不可取的。

如果是这样，这是我正在考虑的另一种选择：

--Create a test table


/****** Object:  Table [dbo].[People2]    Script Date: 03/22/2012 19:07:12 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[People2](
    [PersonId] [int] IDENTITY(1,1) NOT NULL,
    [LastName] [varchar](50) NOT NULL,
    [FirstName] [varchar](50) NOT NULL,
 CONSTRAINT [PK_People2] PRIMARY KEY CLUSTERED 
(
    [PersonId] 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


---Proof of concept

declare @seed int = 1000 --Set the seed

SET IDENTITY_INSERT People2 ON

--Insert a dummy record to increment the identity counter to 1 less than the value that we really want
Insert into people2
(PersonId, LastName,FirstName)
values
(@seed-1, 'temp','dummy')

SET IDENTITY_INSERT People2 OFF

--Delete the record that we just inserted (for no otehr purpose than setting the seed)
delete from People2 where personid = @seed-1  

--Do your normal code to populate the People2 dest table
Insert into people2
(LastName,FirstName)
values
('Jones','John')

--Verify that the seed was set to the value we wanted

select * from People2

其他注意事项是插入我们使用动态SQL创建的临时表，该动态SQL包含从变量中获取的标识种子值。

不太有吸引力的方法是手动浏览记录并手动增加ID，而不是自动列。

Tally表是可能的，但让我感到困惑。

建议？

Answer 1

如果您允许在桌面上拥有ALTER权限，则可以使用SET IDENTITY_INSERT作为第一个值。这会为你更新种子。

从上面关于使用SET IDENTITY_INSERT的链接：

If the value inserted is larger than the current identity value for the table,
SQLServer automatically uses the new inserted value as the current identity value

Answer 2

为什么不

CREATE TABLE [dbo].[People2](
[PersonId] [int] IDENTITY(1000,1) NOT NULL,   ...

将标识种子设置为动态值

2 个答案: