create table taddy (覯 int not null, name varchar(24)) insert taddy select 1,'覦谿' union all select 2,'蠍碁' union all select 3,'蟾一' union all select 4,'' union all select 5,'螳碁' create table taddy_id (覯 int identity(6,1) not null, name varchar(24)) alter table taddy switch to taddy_id drop table taddy exec sp_rename 'taddy_id','taddy' select * from taddy