创建表格 练习题

create database 晚homework
go
use 晚homework
go
create table Student
(
  Sno char(3) primary key,
  Sname char(8) not null,
  Ssex char(2) not null,
  Sbirthday datetime,
  Class char(5)
)

create table Course
(
Cno char(5) primary key,
Cname varchar(10) not null,
Tno char(3) references Teacher(Tno) not null
)

create table Score
(
Sno char(3)references Student(Sno) not null,
Cno char(5)references  Course(Cno) not  null,
Degree decimal(4,1)
primary key(sno,cno)

)
create table Teacher
(
Tno char(3)   primary key,
Tname char(4) not null,
Tsex char(2) not null,
Tbirthday datetime ,
Prof char(6) ,
Depart varchar(10) not null

)

insert  into Student values('108','曾华','男','1977-09-01','95033')
insert  into Student values('105','匡明','男','1975-10-02','95031')
insert  into Student values('107','王丽','女','1976-01-23','95033')
insert  into Student values('101','李军','男','1976-01-20','95033')
insert  into Student values('109','王芳','女','1975-02-10','95031')
insert  into Student values('103','陆军','男','1974-06-03','95031')

insert into Course values('3-105','计算机导论','825')
insert into Course values('3-245','操作系统','804')
insert into Course values('6-166','数字电路','856')
insert into Course values('9-888','高等数学','831')

insert into Score values('103','3-245','86')
insert into Score values('105','3-245','75')
insert into Score values('109','3-245','68')
insert into Score values('103','3-105','92')
insert into Score values('105','3-105','88')
insert into Score values('109','3-105','76')
insert into Score values('101','3-105','64')
insert into Score values('107','3-105','91')
insert into Score values('108','3-105','78')
insert into Score values('101','6-166','85')
insert into Score values('107','6-166','79')
insert into Score values('108','6-166','81')

insert into Teacher values('804','李诚','男','1958-12-02','副教授','计算机系')
insert into Teacher values('856','张旭','男','1969-03-12','讲师','电子工程系')
insert into Teacher values('825','王萍','女','1972-05-05','助教','计算机系')
insert into Teacher values('831','刘冰','女','1977-08-14','助教','电子工程系')