Firebase和Derby之间的区别

1. Firebase：
Firebase由Google在2012年开发。它是一个用于实时存储和同步数据的数据库。它是一个由云托管的实时文档存储，可灵活地从任何设备iOS，Android访问数据。 JavaScript客户端共享一个Realtime Database实例，并自动接收具有最新数据的更新。

2.德比：
Derby是一个开放源代码的关系数据库管理系统。它由Apache Software Foundation在1997年开发。它完全使用Java编程语言编写和实现。 Derby的主要数据库模型是Relational DBMS。所有带有Java VM的操作系统都是服务器操作系统。它根据SQL标准为用户提供了细粒度的访问权限，并提供了一种基于占用空间小的标准数据库引擎，该引擎可以紧密地嵌入到任何基于Java的解决方案中。

Firebase和Derby之间的区别：

S.NO.	FIREBASE	DERBY
1.	It was developed by Google in 2012.	It was developed by Apache Software Foundation in 1997.
2.	It is a commercial database.	It is an open-source database.
3.	The primary database model is Document Store.	The primary database model is Relational DBMS.
4.	It support Objective C, Java and JavaScript as programming languages.	It support Java programming language.
5.	Server operating systems for Firebase are hosted.	Server operating systems for Derby are all OS with a Java VM.
6.	It does not support any replication method.	The replication method that Derby supports is Master-Slave Replication.
7.	It does not support Foreign keys.	It supports Foreign keys.
8.	Android, iOS, JavaScript API, RESTful HTTP API are used as APIs and other access methods.	JDBC is used as APIs and other access methods.
9.	It provides Immediate and Eventual Consistency concept.	It provides Immediate Consistency concept.
10.	It provides access rights based on authentication and database rules.	It provides fine grained access rights according to SQL-standard.