1. Derby :
Derby is a full-featured, open-source relational database management system (RDBMS) implemented in Java, and as the name suggests it is developed by Apache Software Foundations. It is based on Java, JDBC and SQL standards. Derby is easy to install, deploy, and use. It is either embedded into a Java application or used as a database server.
key features of Derby:
- Real-time collaboration: Derby is a real-time database that allows multiple users to collaborate on the same data set in real time.
- Full-stack framework: Derby is a full-stack JavaScript framework, which means that it can be used for both front-end and back-end development.
- Data synchronization: Derby automatically syncs data between clients and the server, ensuring that all users have access to the most up-to-date information.
- Server-side rendering: Derby supports server-side rendering, which can improve the performance and SEO of web applications.
- ORM: Derby includes an Object-Relational Mapping (ORM) system, which simplifies the process of working with databases.
2. PouchDB :
PouchDB is an open-source, NoSQL, in-line database. It is designed after CouchDB, which is a NoSQL database that powers npm. It is written in JavaScript language. There is no need to perform queries over the network as PouchDB resides inside the browser and thus it makes it extremely faster. It stores data locally using IndexedDB and WebSQL in the browser.
key features of PouchDB:
- Offline data sync: PouchDB is a database that can be used offline, and it can sync data with a remote database when an internet connection is available.
- Cross-platform compatibility: PouchDB can run on multiple platforms, including web browsers, Node.js, and mobile devices.
- Flexible data modeling: PouchDB’s document-based data model allows for flexible and dynamic data modeling.
- Querying and indexing: PouchDB supports the querying and indexing of data, making it easier to retrieve specific information from large data sets.
- Integration with other databases: PouchDB can be used in combination with other databases, such as CouchDB and MongoDB, to create a more comprehensive database solution.
Similarities :
- Both Use JSON: Derby and PouchDB both use JSON (JavaScript Object Notation) to store data. This makes it easy for developers to work with data in a familiar format.
- Both Support Querying: Both Derby and PouchDB support querying, which allows developers to retrieve data based on specific criteria.
- Both are NoSQL Databases: Both Derby and PouchDB are NoSQL databases, which means they do not use the traditional relational database model. Instead, they use a document-oriented model, which allows for greater flexibility in data modeling.
- Both are Open Source: Both Derby and PouchDB are open-source databases, which means that the source code is freely available for developers to use, modify, and enhance.
- Both Support Replication: Both Derby and PouchDB support replication, which allows data to be synchronized between multiple devices or databases. This feature is particularly useful for mobile applications and distributed systems.
- Both Can be Used with Node.js: Both Derby and PouchDB can be used with Node.js, a popular JavaScript runtime environment for building server-side applications.
Difference between Derby and Pouchdb:
| Derby | Pouchdb |
|---|---|
| It is developed by Apache Software Foundation in 1997. | It is developed by Apache Software Foundation in 2012. |
| It is written in Java language. | It is written using Javascript language. |
| The primary database model for Derby is Relational DBMS. | The primary database model for PouchDB is Document Store. |
| Server operating systems for Derby are Windows, macOs, Linux, Unix, BSD and z/OS. | PouchDB server operating systems are server-less, requires a JavaScript environment (browser, Node.js). |
| APIs and other access methods used by Derby is JDBC. | APIs and other access methods used by PouchDB is HTTP REST, JavaScript API. |
| It supports only Java programming language. | It supports only Javascript programming language. |
| It supports Master-Slave Replication methods. | It supports Master-master replication, Master-slave replication. |
| In Derby, partitioning cannot be done. | In PouchDB, partitioning can be done by Sharding. |
| It is a open source software framework. | It is a open source software framework. |
| It supports fine grained access rights according to SQL-standard. | It does not support access right. |
Conclusion: Derby and PouchDB are both powerful databases that are designed for use in web applications. While they have some similarities, they also have some important differences, such as their synchronization methods, full-stack vs. client-side design, real-time vs. offline use, and data models. The choice between Derby and PouchDB ultimately depends on the specific needs of the application, such as whether real-time collaboration or offline use is a priority.