标签：bin gty clear 数据库 scope 设计 htm pre https
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
mysql数据库关系表设计原则
原文地址：https://www.cnblogs.com/qinlongqiang/p/11725063.html
