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CouchDB
  • Difficulty Level : Expert
  • Last Updated : 10 Apr, 2020

CouchDB is an open-source NoSQL database. It mainly focuses on ease of use. It was developed by the Apache software foundation.

Apache CouchDB is one of the latest breed of databases. CouchDB is a multi-master application released in 2005 and became an Apache project in 2008. It is written in the Erlang programming language. It is basically a document-oriented database and within each document fields are stored as key-value maps. Fields can be either a simple key/value pair, list, or map.

CouchDB uses HTTP protocol for API. It uses javascript as its query language to transform the documents and JSON to store data.

Why CouchDB ?
CouchDB is used as it very powerful to query your data. It also has a schema-free document model which makes it more friendly with the common application and makes it easy to use.

  • The data we store is in a flexible document-based structure which eliminates the need to worry about the structure of your data, either before or during your application development.
  • It provides users with powerful data mapping, which gives access for filtering of information, combining and querying.
  • CouchDB has an HTTP-based REST API, which helps to communicate with the database easily.
  • Methods like GET, PUT, DELETE are very easy to understand, use and develop with.

CouchDB Data Model :



  • In CouchDB each database is a collection of independent documents which makes the outermost data structure/container of it.
  • Each document maintains its own data and self-contained schema.
  • To merge the differences occurred while the databases were disconnected, Document metadata contains revision information.
  • To avoid the need to lock the database field during writes, it implements multi version concurrency control.

Installing CouchDB :

  1. Download CouchDB software from official website.
  2. Install the downloaded software.
  3. Now visit the link http://127.0.0.1:5984/.

  4. To interact with CouchDB web interface go to the link http://127.0.0.1:5984/_utils/.

Now, you have successfully installed CouchDB.

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