*************** 准备环境********************/
--
判断是否存在test表
if object_id(N
‘test‘,N
‘U‘)
is not
null
drop table test
--
创建test表
create table test
(
id int not
null,
name varchar(20) not
null
)
--
插入临时数据
insert into test values (1,
‘成龙‘)
insert into test values (3,
‘章子怡‘)
insert into test values (4,
‘刘若英‘)
insert into test values (8,
‘王菲‘)
select *
from test
/**************** 实现更改自动增长列********************/
begin transaction
create table test_tmp
(
id int not
null identity(
1,
1),
name varchar(20) not
null
)
go
set identity_insert test_tmp on
go
if exists(
select *
from test)
exec(‘ insert into test_tmp(id, name ) select id, name from test with(holdlock tablockx)‘)
go
set identity_insert test_tmp off
go
drop table test
go
exec sp_rename N‘test_tmp‘ ,N
‘test‘ ,
‘OBJECT‘
go
commit
GO
/****************验证结果*****************/
insert into test values (‘张曼‘)
select *
from test
实例：
/**************** 实现更改自动增长列********************/
begin transaction
create table test_tmp
(
UserGradeID int not null identity(1,1),
UserGrade nvarchar(8) not null,
[Status] int not null,
Remark nvarchar(128) ,
adduser nvarchar(32) ,
upduser nvarchar(32) ,
addtime datetime2(7) ,
updtime datetime2(7)
)
go
set identity_insert test_tmp on
go
if exists(select * from m_usergrade)
exec(‘ insert into test_tmp(UserGradeID,UserGrade,[Status],Remark,adduser,upduser,addtime,updtime )
select UserGradeID,UserGrade,[Status],Remark,adduser,upduser,addtime,updtime from m_usergrade with(holdlock tablockx)‘)
go
set identity_insert test_tmp off
go
drop table m_usergrade
go
exec sp_rename N‘test_tmp‘ ,N‘m_usergrade‘ , ‘OBJECT‘
go
commit
GO
将sql Server 的table的列 ，由非自增长改为自增长
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