学生选课数据库、数据表

–1. 创建一个名字为"Studentxuanke数据库"的数据库

CREATE DATABASE xuanke
ON  PRIMARY 
( NAME = 'xuanke_data', 
  FILENAME = 'E:\Professional flie\SQL file\database\xuanke\xuanke_data.mdf' , 
  SIZE = 5120KB , MAXSIZE = 15360KB , 
  FILEGROWTH = 20%)
 LOG ON 
( NAME = 'xuanke_log', 
  FILENAME = 'E:\Professional flie\SQL file\database\xuanke\xuanke_log.ldf' , 
  SIZE = 5120KB , MAXSIZE = 10240KB , 
  FILEGROWTH = 1024KB )

–2. 使用操作创建“Student”表

CREATE TABLE Student
(
	Sno nchar(10) PRIMARY KEY,
	Sname nchar(10),
	Ssex nchar(10),
	Sbirthday datetime 
)

INSERT INTO Student
(Sno ,	Sname ,Ssex ,Sbirthday)
VALUES
('090101','汪涵','男','1990-1-1')

INSERT INTO Student
(Sno ,	Sname ,Ssex ,Sbirthday)
VALUES
('090102','刘洁','女','1991-3-4')

INSERT INTO Student
(Sno ,	Sname ,Ssex ,Sbirthday)
VALUES('090103','刘莉莉','女','1992-5-6')

–3.使用T-SQL语句创建“课程”表。

CREATE TABLE Course
(
   Cno nchar(10) PRIMARY KEY,
   Cname   nchar(10),
   Score     real,
   Xcno nchar(10)
)

INSERT INTO Course
(Cno,Cname,Score,Xcno)
VALUES
('C001','C语言',2,'')

INSERT INTO Course
(Cno,Cname,Score,Xcno)
VALUES
('C002','数据结构',2,'C001')

INSERT INTO Course
(Cno,Cname,Score,Xcno)
VALUES
('C003','数据库原理',2,'')

–4.使用T-SQL语句创建“xuanke”表。

CREATE TABLE xuanke
(
	Sno nchar(10) ,
	Cno nchar(10) ,
	Result real 
	PRIMARY KEY(Sno,Cno)
)

INSERT INTO xuanke
(Sno,	Cno,Result) 
VALUES
('090101','C001',78)

INSERT INTO xuanke
(Sno,	Cno,Result) 
VALUES
('090101','C002',87)

INSERT INTO xuanke
(Sno,	Cno,Result) 
VALUES
('090102','C001',97)

INSERT INTO xuanke
(Sno,	Cno,Result) 
VALUES
('090102','C002',79)

INSERT INTO xuanke
(Sno,	Cno,Result) 
VALUES
('090102','C003',56)

INSERT INTO xuanke
(Sno,	Cno,Result) 
VALUES
('090103','C001',55)