diff --git "a/29 \350\267\257\347\216\262/20230905 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.md" "b/29 \350\267\257\347\216\262/20230905 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.md"
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+```mysql
+create database school charset utf8;
+
+use school;
+
+-- 院系表
+create table department(
+	d_id int primary key,
+	d_name varchar(10)
+);
+insert into department values
+(123,'软件工程学院'),
+(456,'信息工程学院'),
+(789,'建筑工程学院');
+
+-- 专业表
+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
+(11,'软件技术与开发',123),
+(22,'信息技术',456),
+(33,'建筑设计',789);
+
+-- 教室表
+create table classroom(
+r_id int PRIMARY KEY,
+r_name varchar(10)
+);
+insert into classroom values
+(1,'实训一'),
+(2,'实训二'),
+(3,'实训三');
+
+-- 班级表
+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',11),
+(2,'软件技术2班',11),
+(3,'软件技术3班',11);
+
+-- 课程
+CREATE TABLE course(
+	couseId int PRIMARY key,
+	courseName varchar(10),
+     credit int,
+	c_id int,-- 班级编号
+	r_id int,-- 教室编号
+	foreign key (c_id) references class(c_id),
+	foreign key (r_id) references classroom(r_id)
+);
+insert into course VALUES
+(1,'java',78,1,2),
+(2,'html',90,2,3),
+(3,'mysql',80,3,1);
+
+-- 教师表
+create table teacher(
+	t_id int primary key,
+	t_name varchar(10),
+    sex varchar(10),
+     d_id int,-- 院系编号
+	couseId int,-- 课程编号
+    foreign key (d_id) references department(d_id),
+	foreign key (couseId) references course(couseId)
+);
+insert into teacher values
+(1,'张三','男',123,1),
+(2,'张四','男',456,2),
+(3,'李美','女',789,3);
+
+-- 课程表
+create table `select` (
+	selectId int primary key,
+	couseId int,-- 课程编号
+	time varchar(20),
+	t_id int,-- 教师编号
+	r_id int,-- 班级编号
+	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,'周一上午',2,3),
+(2,2,'周二下午',1,2),
+(3,3,'周三上午',3,1);
+
+-- 学生表
+create table student (
+	id int primary key,
+	name varchar(10),
+	sex varchar(5),
+	age int,
+	address varchar(20),
+     d_id int,-- 院系编号
+	c_id int,-- 课程编号
+	selectId int,-- 选修表的编号
+    foreign key (d_id) references department(d_id),
+	foreign key (c_id) references class(c_id),
+	foreign key (selectId) references `select`(selectId)
+);
+insert into student values
+(11111,'小明','男',18,'团结里1',123,1,1),
+(22222,'小花','女',118,'团结里2',123,2,2),
+(33333,'小王','男',1118,'团结里3',456,3,3);
+
+```
+