orm对象数据库的相关内容

阿里云文档 2025-02-10

修改备份的数据库对象

数据灾备（DBS）支持用户按需修改备份的数据库对象。

阿里云文档 2024-11-25

使用ST_MapMatching函数输出匹配道路集合对象

在指定的工作空间中根据路网数据对输入几何对象进行匹配，输出匹配的道路几何对象。

阿里云文档 2024-10-23

使用ST_MapMatching函数输出匹配道路集合对象

在指定的工作空间中根据路网数据对输入几何对象进行匹配，输出匹配的道路几何对象。

阿里云文档 2024-08-14

使用ST_AsProtobuf函数将轨迹对象转换为Pbf格式

将一个轨迹对象转换为Protobuf（Pbf）格式类型，用于数据交换。

文章 2023-02-08 来自：开发者社区

ORM的全称是:Object Relational Mapping,即对象/关系数据库映射.当使用一种面向对象的编程语言来进行应用开发时,从项目一开始就采用的是面向对象分析,面向对象设计,面向对象编程,但到了持久层数据库访问时,又必须重返关系数据库的访问方式,这是一种非常糟糕的感觉.于是人们需要一种工具,它可以把关系型数据库包装成面向对象的模型.它就是ORM。ORM使类提供自动化CRUD，使开发....

文章 2022-02-16 来自：开发者社区

ORM武器：NHibernate（三）五个步骤+简单对象CRUD+HQL

前面的两篇文章中。我们对NHibernate已经做了大致了解《ORM利器：NHibernate（一）简单介绍》Nhibernate的作用：攻克了对象和数据库的转化问题《ORM利器：NHibernate（二）使用CodeSmith高速生成映射文件和映射类》利用CodeSmith由表导出映射类（就是通常所说的Entity）和映射文...

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