From 89e532a3a5fd7678ebef664452d83fd7cd8f2647 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=97=E5=B3=B0?= <1429859560@qq.com>
Date: Thu, 7 Sep 2023 03:32:08 +0000
Subject: [PATCH] =?UTF-8?q?59=20=E6=9E=97=E5=B3=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 林峰 <1429859560@qq.com>
---
 ...0\345\217\212\347\254\224\350\256\260.txt" | 111 ++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 "9.5-6\345\217\267\347\254\224\350\256\260\345\217\212\347\254\224\350\256\260.txt"

diff --git "a/9.5-6\345\217\267\347\254\224\350\256\260\345\217\212\347\254\224\350\256\260.txt" "b/9.5-6\345\217\267\347\254\224\350\256\260\345\217\212\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000..d030a12
--- /dev/null
+++ "b/9.5-6\345\217\267\347\254\224\350\256\260\345\217\212\347\254\224\350\256\260.txt"
@@ -0,0 +1,111 @@
+9.5
+今天课上老师带我们了解到这个专业的就业方向和就业难度，初步了解后，深感将来就业不易，
+因此我应在接下来的学习生活中端正学习态度，克服困难，奋力拼搏。
+9.6
+开发一个学生信息管理系统，用来管理学生，课程，教师三者，入其延伸出的数据编程，
+以小组为单位，完成数据库。
+学生：学号、姓名、性别、年龄、联系方式
+课程：课程编号、名称、学分
+教师：工号、姓名、性别、年龄、联系方式
+关系是相互的
+表与表之间的关系：一对一、一对多、多对多
+一对一：将其中任一表的主键，放在另一张表当外键
+一对多：将一所在的表的主键，放在多的表当外键
+多对多：必须第三张表，将前面两个表的主键放进来当外键
+
+9.6作业
+create database school charset utf8;
+
+use school;
+
+-- 院系
+create table department(
+	d_id int primary key,
+	d_name varchar(10),
+	d_address varchar(10)
+);
+insert into department values
+(1,'软件工程学院','望云楼');
+
+-- 专业
+create table speciality(
+	s_id int primary key,
+	s_name varchar(10),
+	d_id int,
+	foreign key (d_id) references department(d_id)
+);
+insert into speciality values
+(100,'软件技术',1);
+
+-- 教室
+create table classroom(
+r_id int PRIMARY KEY,
+r_name varchar(10)
+);
+insert into classroom values
+(1,'实训四'),
+(2,'实训八');
+
+-- 班级
+create table class(
+	c_id int primary key,
+	c_name varchar(10),
+	s_id int,
+	foreign key (s_id) references speciality(s_id)
+);
+insert into class values
+(1,'软件技术1班',100),
+(2,'软件技术2班',100);
+
+-- 课程
+CREATE TABLE course(
+	couseId int PRIMARY key,
+	courseName varchar(10),
+	c_id int,
+	r_id int,
+	foreign key (c_id) references class(c_id),
+	foreign key (r_id) references classroom(r_id)
+);
+insert into course VALUES
+(1,'Java',1,1),
+(2,'MySQL',2,2);
+
+-- 教师
+create table teacher(
+	t_id int primary key,
+	t_name varchar(10),
+	couseId int,
+	foreign key (couseId) references course(couseId)
+);
+insert into teacher values
+(1,'一一',1),
+(2,'阿九',2);
+
+-- 课程表
+create table `select` (
+	selectId int primary key,
+	couseId int,
+	time varchar(20),
+	t_id int,
+	r_id int,
+	foreign key (couseId) references course(couseId),
+	foreign key (t_id) references teacher(t_id),
+	foreign key (r_id) references classroom(r_id)
+);
+insert into `select` values
+(1,1,'周一8:00-11:40',2,1),
+(2,2,'周一14:00-17:40',1,2);
+
+-- 学生
+create table student (
+	id int primary key,
+	name varchar(10),
+	c_id int,
+	selectId int,
+	foreign key (c_id) references class(c_id),
+	foreign key (selectId) references `select`(selectId)
+);
+insert into student values
+(2201,'张三',1,1),
+(2202,'李四',2,2),
+(2203,'王五',1,1);
\ No newline at end of file
-- 
Gitee