Database Design（数据库设计）
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);
INSERT INTO teacher (id,name) VALUES(1,\'qixy\');
INSERT INTO teacher (id,name) VALUES(2,\'huanglaosh\');
select * from pupil,teacher where tid=teacher.id and teacher.name=\'qixy\';
+----+-----------+------+----+------+
| id | name | tid | id | name |
+----+-----------+------+----+------+
| 1 | liyaohua | 1 | 1 | qixy |
| 2 | fuwenlong | 1 | 1 | qixy |
+----+-----------+------+----+------+
更多内容请见原文，文章转载自：https://blog.csdn.net/qq_44591615/article/details/109205809
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