mysql数据库关系表设计原则

https://blog.csdn.net/qq_36432666/article/details/78934073

https://kb.cnblogs.com/page/138526/

http://blog.sina.com.cn/s/blog_a29f7cb50101jr5d.html

https://www.cnblogs.com/mjbrian/p/6841226.html

https://blog.csdn.net/persistencequxi/article/details/78502501

原文地址：https://www.cnblogs.com/qinlongqiang/p/11725063.html