sql 表修改列
create table #a
(
a int identity(1,1) primary key,
b int default(0) not null,
c nvarchar(20)
)
insert into #a(c)
select 'a' union all
select 'b' union all
select 'c' union all
select 'd' union all
select 'e'
select * from #a
alter table #a drop constraint DF__#a_____________b__1273C1CD
alter table #a add constraint DF__#a_____________b__1273C1CD default(1) for b
alter table #a add c nvarchar(10) not null constraint DF_#a_b default('aa')
--有约束的时候可以通过错误提示来查约束名
alter table 表名 drop column [列名]
alter table 表名 add [列名] [类型] NULL CONSTRAINT [DF_表名_列名] DEFAULT ((0))
select * from #a
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递归函数
*/
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as
begin
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set @len = 0
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2009年06月24日 09:47
create table [表名]
(
[自动编号字段] int IDENTITY (1,1) PRIMARY KEY ,
[字段1] nVarChar(50) default '默认值' null ,
[字段2] ntext null ,
[字段3] datetime,
[字段4] money null ,
[字段5] int default 0,
[字段6] Decimal (12,4) default 0,
[字段7] image null ,
)
� ......
