sql基本语句顺序实行，可能需要分拆看到效果

create DATABASE test3
go

use test3
create table dbo.studentlxx
(stuID int primary key not null,
stuName varchar(20) not null,
stuSex varchar(20) null,
stuClass varchar(20) null)
go

use test3
insert dbo.studentlxx
values(20082057, 'lixingxing', 'male', 'class3')
go

use test3
insert dbo.studentlxx (stuID, stuName)
values(20080258, 'lichangqing')
go

use test3
update dbo.studentlxx
set stuSex = 'female'
where stuID = 20082058
go

use test3
select * from dbo.studentlxx
go

select stuID from dbo.studentlxx where stuName = 'lixingxing'
go

delete from dbo.studentlxx where stuName = 'lixingxing'