if exists(select * from sys.sysdatabases where [name] = 'DB_Student')
drop database DB_Student
go

create database DB_Student
on
(
?? ?name = DB_Student_mdf,
?? ?filename = 'E:\DB_Student_mdf.mdf',
?? ?size = 3mb,
?? ?maxsize = 100mb,
?? ?filegrowth=1mb
)
log on
(
?? ?name = DB_Student_ldf,
?? ?filename = 'E:\DB_Student_ldf.mdf',
?? ?size = 3mb,
?? ?maxsize = 100mb,
?? ?filegrowth = 1mb
)

use DB_Student
if exists(select * from sys.objects where [name] = 'T_userInfo' )
drop table T_userInfo
go

use DB_Student
create table T_userInfo
(
?? ?stuName varchar(20),
?? ?stuId varchar(20) primary key,
?? ?score float,
?? ?sex varchar(4)
)

alter table T_userInfo
add hobby varchar(20)
go

alter table T_userInfo
alter column hobby varchar(25)
go

use DB_Student

exec sp_rename 'T_userInfo.hobby','hobbys'
go

alter table T_userInfo
drop column hobbys
go

怎樣建立數據庫以及數據表，以及表中數據項的更改