以创建学生教师表为例: 学生id关联教师tid
学生表: student
教师表: teacher
sql语句 :
USE school;CREATE TABLE student(id INT(10) NOT NULL PRIMARY KEY,NAME VARCHAR(30) DEFAULT NULL,tid INT(10) DEFAULT NULL,KEY `fktid` (`tid`),CONSTRAINT `fktid` FOREIGN KEY(`tid`) REFERENCES `teacher` (`id`))ENGINE=INNODB DEFAULT CHARSET=utf8INSERT INTO student VALUES(1,'小明',1);INSERT INTO student VALUES(2,'小红',1);INSERT INTO student VALUES(3,'小刚',1);INSERT INTO student VALUES(4,'小王',1);INSERT INTO student VALUES(5,'小智',1);SELECT * FROM student;CREATE TABLE teacher (id INT(10) PRIMARY KEY NOT NULL,NAME VARCHAR (30) DEFAULT NULL)ENGINE=INNODB DEFAULT CHARSET=utf8INSERT INTO teacher VALUES(1,'陈老师');SELECT * FROM teacher;
重点: 外键关联语句,会手写才可以!
KEY `fktid` (`tid`),CONSTRAINT `fktid` FOREIGN KEY(`tid`) REFERENCES `teacher` (`id`)
