mysql的学习:
 先介绍一下个人情况:不是小白但很菜!
 具体如下:
 第一步:安装mysql、Navicat
 第二步:做一个具体的数据库,边敲边学(理论我都懂,所以直接跳过)
 我选的是一个学生选课表
 具体如下:
/*
创建以下表:
学生信息表(Student)、教师信息表(Teacher)、
院系表(Department)、课程信息表(Course)、
成绩表(Achievement)、管理员信息表(Administrator)
*/
 
CREATE TABLE
IF
	NOT EXISTS Student (
		Sid VARCHAR ( 10 ) PRIMARY KEY,
		Sname VARCHAR ( 20 ),
		Ssex VARCHAR ( 2 ) CHECK( ssex in ('男'or'女')),
		Spre VARCHAR ( 20 ),
		Sdep VARCHAR ( 20 ),
	Stel VARCHAR ( 13 ));
CREATE TABLE
IF
	NOT EXISTS Teacher (
		Tid VARCHAR ( 10 ) PRIMARY KEY,
		Tname VARCHAR ( 20 ),
		Tsex VARCHAR ( 2 ) CHECK( tsex in ('男'or'女')),
		Tcou VARCHAR ( 20 ),
		Ttel VARCHAR ( 13 ) 
	) ;CREATE TABLE
IF
	NOT EXISTS Department (
		Tid VARCHAR ( 10 ) PRIMARY KEY,
		Tmc VARCHAR ( 20 ),
		Tname VARCHAR ( 20 ),
	Ttel VARCHAR ( 13 )) ;CREATE TABLE
IF
	NOT EXISTS Course ( Cid VARCHAR ( 10 ) PRIMARY KEY, 
	Cname VARCHAR ( 20 ), 
	Stc VARCHAR ( 10 ), 
	Cxf VARCHAR ( 5 ) ) ;
CREATE TABLE
IF
	NOT EXISTS Achievement ( Sid VARCHAR ( 10 ),
	Sname VARCHAR ( 20 ),
	Aid VARCHAR ( 10 ),
	Cname VARCHAR ( 20 ),
	Afs TINYINT ) ;
	CREATE TABLE
IF
	NOT EXISTS Administration (
		Aname VARCHAR ( 10 ),
	Asex VARCHAR ( 2 ) CHECK( asex in ('男'or'女')),
	Atel VARCHAR ( 13 ));










