SQL server 创建表练习.doc
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实验二 创建数据库和表
/* 一、创建DB_student数据库 */
/*如果DB_student数据库存在，删除它*/
Use master
If exists (select name from master.dbo.sysdatabases where name=DB_student)
Drop database DB_student
Go
/* 以下创建DB_student数据库*/
Create database DB_student
On primary
(name=DB_student_data,
Filename=c:\program files\microsoft sql server\mssql\data\DB_student_data.mdf,
Size=5mb,
Maxsize=50mb,
Filegrowth=10%)
Log on
(name=DB_student_log,
Filename=c:\program files\microsoft sql server\mssql\data\DB_student_data.ldf,
Size=5mb,
Maxsize=25mb,
Filegrowth=10%)
Go
/* 在DB_student数据库中创建student表 */
/*打开DB_student数据库*/
use DB_student
Go
/*在DB_student数据库中，如果student表存在，就删除*/
if exists ( select * from dbo.sysobjects where id=object_id(student)
and OBJECTPROPERTY(id,IsUserTable)=1)
drop table student
Go
/*以下创建student 数据库表*/
create table Student
( sno char(9) Constraint PK_student_sno primary key,
Sname char(20),
ssex char(2),
sage smallint,
sdept char(20)
);
Go
/* 在DB_student数据库中创建course表 */
/*在DB_student数据库中，如果course数据库表存在，就删除*/
if exists ( select * from dbo.sysobjects where id=object_id(course)
and OBJECTPROPERTY(id,IsUserTable)=1)
drop table course
Go
/*以下创建course 数据库表*/
create table course
( cno char(4) Constraint PK_Course_cno primary key,
cname char(40),
cpno char(4),
ccredit smallint,
/*Foreign Key cpno References Course (cno)*/
);
Go
/* 在DB_student数据库中创建SC表 */
/*在DB_student数据库中，如果SC数据库表存在，就删除*/
if exists ( select * from dbo.sysobjects where id=object_id(sc)
and OBJECTPROPERTY(id,IsUserTable)=1)
drop table sc
Go
/*以下创建sc 数据库表*/
create table sc
( sno char(9),
cno char(4),
grade smallint,
Constraint PK_sc_sno_cno primary key (sno,cno),
Constraint RFK_sc_sno Foreign Key (sno) References student (sno),
Constraint RFK_sc_cno Foreign Key (cno) References Course (cno)
);
Go
/* 为student数据表添加数据 */
Insert into student
Values (200215121,李勇,男,20,CS);
Insert into student
Values (200215122,刘
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