设有一数据库，包括四个表：学生表（Student）、课程表（Course）、成绩表（Score）以及教师信息表（Teacher）。四个表的结构分别如表1-1的表（一~表（四）所示，数据如表1-2的表（一）~表（四）所示。用SQL语句创建四个表并完成相关题目。

create database ceshi
go

use ceshi
go
create table Student
(
Sno Char(3)primary key,
Sname Char(8),
Ssex Char(2),
Sbirthday datetime,
Class Char(5)
)
go
create table Course
(
Cno Char(5)primary key,
Cname Varchar(10),
Tno Char(3)
)
go
create table Score
(
Sno Char(3),
Cno Char(5),
Degree Decimal(4,1)
)
go
create table Teacher
(
Tno Char(3)primary key,
Tname Char(4),
Tsex Char(2),
Tbirthday datetime,
Prof Char(6),
Depart Varchar(10)
)
go
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','1976-02-20','95033')
insert into Student values(109,'王芳','女','1975-02-10','95031')
insert into Student values(103,'陆君','男','1974-06-03','95031')
go
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)
go
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)
go
insert into Teacher values(804,'李诚','男','1985-12-02','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')
go