本示例来显示用SQL语句修改cells表的字段AutoPublishCount的默认值从10改为1000
/创建表结构和默认值/
IF EXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = N’testdb’)
DROP DATABASE [testdb]
go
create database testdb
go
use testdb
go
CREATE TABLE [Cells] (
[CellID] [int] IDENTITY (1, 1) NOT NULL ,
[PageID] [int] NULL ,
[AutoPublishCount] [int] NOT NULL CONSTRAINT [DF_Publish_AutoPublishCount] DEFAULT (10),
CONSTRAINT [PK_CELLS] PRIMARY KEY CLUSTERED
(
[CellID]
) WITH FILLFACTOR = 90 ON [PRIMARY]
) ON [PRIMARY]
GO
select from cells
/修改字段默认值/
declare @name varchar(1000)
declare @tablename varchar(1000)
declare @fieldname varchar(1000)
set @tablename=’cells’
set @fieldname=’AutoPublishCount’
select @name=b.name from syscolumns a,sysobjects b
where a.id=object_id(@tablename)
and b.id=a.cdefault
and a.name=@fieldname
and b.name like ’DF%’
exec(’alter table cells drop constraint ’+@name)
ALTER TABLE [cells]
ADD CONSTRAINT DF_Publish_AutoPublishCount DEFAULT (1000) FOR [AutoPublishCount]
责任编辑：小草
