[英]Identity Problems During Database Creation
使用SQL Server Management Studio,我的问题源于数据库创建脚本。 编写脚本是为了创建数据库,其中许多表都有一个标识列:
CREATE TABLE Workshop
(
WorkshopID int IDENTITY,
WorkshopName varchar(40) NOT NULL,
Description varchar(800),
CONSTRAINT PK_Workshop PRIMARY KEY (WorkshopID)
);
我的问题是,即使脚本简单地将一列创建为标识列,脚本运行后,没有任何应作为标识列的列实际上没有将该列设置为标识。
需要说明的是:运行上面的代码将按照指定的方式创建该表,但WorkshopID不会是标识列。
为了使脚本按编写的方式工作,需要进行哪些更改?
仅供参考,如果您使用SQL Management Studio的设计器为此生成脚本,则将生成以下脚本:
/* To prevent any potential data loss issues, you should review this script in detail before running it outside the context of the database designer.*/
BEGIN TRANSACTION
SET QUOTED_IDENTIFIER ON
SET ARITHABORT ON
SET NUMERIC_ROUNDABORT OFF
SET CONCAT_NULL_YIELDS_NULL ON
SET ANSI_NULLS ON
SET ANSI_PADDING ON
SET ANSI_WARNINGS ON
COMMIT
BEGIN TRANSACTION
GO
CREATE TABLE dbo.Table_1
(
WorkshopID int NOT NULL IDENTITY (1, 1),
WorkshopName varchar(40) NOT NULL,
Description varchar(800) NULL
) ON [PRIMARY]
GO
ALTER TABLE dbo.Table_1 ADD CONSTRAINT
PK_Table_1 PRIMARY KEY CLUSTERED
(
WorkshopID
) WITH( STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO
ALTER TABLE dbo.Table_1 SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
如果创建表,然后使用“创建到...”菜单选项将其脚本化,则将获得完全不同的脚本:
USE [MyDatabase]
GO
/****** Object: Table [dbo].[Workshop] Script Date: 11/27/2012 14:05:33 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Workshop](
[WorkshopID] [int] IDENTITY(1,1) NOT NULL,
[WorkshopName] [varchar](40) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[Description] [varchar](800) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
CONSTRAINT [PK_Workshop] PRIMARY KEY CLUSTERED
(
[WorkshopID] 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
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