https://www.chenshaowen.com/en/tags/sql/Recent content in SQL on Shaowen Chen's WebsiteHugo -- gohugo.ioen©2016 - {year}, All Rights Reserved.Fri, 21 Jul 2017 13:21:08 +0000weeklyhttps://www.chenshaowen.com/en/blog/sql-code-about-django-orm.htmlFri, 21 Jul 2017 13:21:08 +0000Fri, 21 Jul 2017 13:21:08 +0000https://www.chenshaowen.com/en/blog/sql-code-about-django-orm.html1. Basic Concepts ORM: Object Relational Mapping. Its job is to map between a relational database and objects. No complex SQL statements are needed — operating on data is as simple as operating on objects. QuerySet: the list of objects for a given model. A QuerySet lets you read data微信公众号DjangoPythonDataSQLR&D