mysql20170404代码实现

 

CREATE DATABASE IF NOT EXISTS school;

USE school;

CREATE TABLE tblStudent(
StuId INT(4) NOT NULL PRIMARY KEY,
StuName VARCHAR(20) NOT NULL,
StuAge INT(3),
StuSex CHAR(2)

);

CREATE TABLE tblCourse(
CourseId INT(4) NOT NULL PRIMARY KEY,
CourseName VARCHAR(20) NOT NULL,
TeaId INT(4)

);

CREATE TABLE tblScore(
StuId INT(4) NOT NULL PRIMARY KEY,
CourseId INT(4),
Score DECIMAL(20)

);

CREATE TABLE tblTeacher(
TeaId INT(4)NOT NULL PRIMARY KEY,
TeaName VARCHAR(20)

);

DROP TABLE tblTeacher;

建库建表