ORM Active Record Data Mapper
What's the difference between Active Record and Data Mapper? https://www.culttt.com/2014/06/18/whats-difference-active-record-data-mapper/
ORM 实例教程 - 阮一峰的网络日志 http://www.ruanyifeng.com/blog/2019/02/orm-tutorial.html
What's the difference between Active Record and Data Mapper? https://www.culttt.com/2014/06/18/whats-difference-active-record-data-mapper/
ORM 实例教程 - 阮一峰的网络日志 http://www.ruanyifeng.com/blog/2019/02/orm-tutorial.html
