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我有一個數據庫應用程序,他們工作得很好,一切都很好。如何創建一個用於修改數據庫中現有表而不丟失現有信息的腳本?
現在,我只需要通過添加更多列來修改數據庫中的一個表。我正在使用SQL Server,數據庫管理員要求我爲他提供修改該表的腳本。
那麼該怎麼做?
我正在使用SQL Server Management Studio,當我單擊表格右鍵時,我用來選擇腳本來創建,而Management Studio會給我腳本。現在,這個表有信息,所以我認爲我不應該爲這個表使用創建腳本。
新列應該允許空值。
那麼,我應該使用什麼?
爲了您的信息,下面是用於創建表的腳本:應該添加到此表的新列的
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Test](
[ID] [numeric](18, 0) IDENTITY(1,1) NOT NULL,
[No] [char](20) NOT NULL,
[Date] [smalldatetime] NULL,
[ProjectType] [char](500) NULL,
[ProjectPhase] [char](300) NULL,
[rejected_reason] [varchar](max) NULL,
[archived_reason] [varchar](max) NULL,
[forward_to] [varchar](max) NULL,
[forward_type] [varchar](max) NULL,
[forward_concern] [varchar](max) NULL,
CONSTRAINT [PK_Test] 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] TEXTIMAGE_ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLATestB_No] DEFAULT ('*') FOR [No]
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLATestB_Status] DEFAULT ((2)) FOR [Status]
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLATestB_AID] DEFAULT ((0)) FOR [AID]
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLATestB_Hit] DEFAULT ((0)) FOR [Hit]
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLATestB_Sent] DEFAULT ((0)) FOR [Sent]
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLATestB_SentTo] DEFAULT ((0)) FOR [SentTo]
GO
ALTER TABLE [dbo].[Test] ADD CONSTRAINT [DF_LLa_Added_To_Cart] DEFAULT ((0)) FOR [Added_To_Cart]
GO
的例子是:
[rejected_reason] [varchar](max) NULL,
[archived_reason] [varchar](max) NULL,
[forward_to] [varchar](max) NULL,
[forward_type] [varchar](max) NULL,
在線閱讀書籍:ALTER TABLE –