打开管理员终端
登入Mysql,输入:
Mysql -uroot -p******

创建数据库:
create database 数据库名;
 
 
使用数据库
use 数据库名;
 
 
创建数据表teacher,输入:
create table teacher(
     -> no char(4) comment"教师号" primary key,
     -> name varchar(10) comment"教师姓名" not null,
     -> prof varchar(20) comment"职称" not null default"助教",
     -> sal int(2) comment"工资"not null,
     -> comm smallint(2) comment"岗位津贴"
     -> );
 

创建数据表student,输入: 
 
 
 create table student(
     -> no char(4) comment"学生号" primary key,
     -> name varchar(10) comment"学生姓名" not null,
     -> age tinyint(1) comment"年龄" not null,
     -> dept varchar(20) comment"系名" not null default"计算机系"
     -> );
 

创建数据表course,输入:
 create table course(
     -> no char(4) comment"课程号" primary key,
     -> name varchar(20) comment"课程名" not null unique,
     -> class_hours int(2) comment"课时数" default"45"
     -> );
 
创建数据表 school_teaching,输入:
create table school_teaching(
     -> id int(4) comment"序号" primary key auto_increment,
     -> course_no char(4) comment"课程号" not null,
     -> teacher_no char(4) comment"教师号" not null,
     -> week int(2) comment "周数" default"15",
     -> class_num varchar(10) comment"教师号",
     -> constraint fk_course_no foreign key (course_no) references course(no),
     -> constraint fk_teacher_no foreign key (teacher_no) references teacher(no)
     -> );
 
创建数据表chengweiqiang_grade,输入:
 create table chengweiqiang_grade(
     -> course_no char(4) comment"课程号" not null,
     -> student_no char(4) comment"学生号" not null,
     -> score float comment"成绩" not null default"60",
     -> primary key(course_no,student_no)
     -> );
 

删除数据表,输入: 
 
drop table 表名;
删除数据库,输入:
drop datablase 数据库名;
 
 
退出Mysql,输入:
\q;













