Data Design(数据库设计)(视频下载) (全部书籍)


马克-to-win:

(一对多:one-to-many)

1) teacher and student.

(teacher表:两列id(主键),name。
pupil表: 三列:id(主键),name,tid(外键))

 

举例: Teacher \"qixy\" has two students: liyaohua,fuwenlong. Teacher \"huanglaosh\" has two students: mashuai,jiaxiaohu.

create table pupil(id int not null,name char(10),tid int);

create table teacher(id int not null,name char(10));

INSERT INTO pupil (id,name,tid) VALUES(1,\'liyaohua\',1);
INSERT INTO pupil (id,name,tid) VALUES(2,\'fuwenlong\',1);
INSERT INTO pupil (id,name,tid) VALUES(3,\'mashuai\',2);
INSERT INTO pupil (id,name,tid) VALUES(4,\'jiaxiaohu\',2);

详情请看:http://www.mark-to-win.com/index.html?content=Mydb/DBUrl.html&chapter=Mydb/DBIntroduction_web.html#DesignOneMany

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