SQL server 2008 创建主键为自增列的表

使用Tranact-SQL 编写代码来创建一个新表：
 
USE [OnlineJudge]
GO
/****** Object: Table [dbo].[User1] Script Date: 05/17/2010 14:05:06 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[User2](/*notice convert the tablename*/
[num] [int]IDENTITY(1,1) NOT NULL,
[userid] [nchar](10) NOT NULL,
[password] [nchar](10) NOT NULL,
[authority] [int] NOT NULL,
[logintime] [datetime] NOT NULL,
CONSTRAINT [PK_User2] PRIMARY KEY CLUSTERED /*notice convert the tablename*/
(
[num] 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