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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 :
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | 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=utf8 insert 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=utf8 insert into teacher values (1, '陈老师' ); select * from teacher; |
重点: 外键关联语句,会手写才可以!
| 1 2 | key `fktid` (`tid`), constraint `fktid` foreign key (`tid`) references `teacher` (`id`) |
总结
到此这篇关于sql语句创建外键关联的文章就介绍到这了。
