CouchDB和MariaDB之间的区别

1. CouchDB：
Apache CouchDB是面向开源文档的NoSQL数据库，它使用多种格式和协议来存储，传输和处理其数据，它使用JSON来存储数据，使用JavaScript作为其使用MapReduce的查询语言以及使用HTTP作为API。它由Apache Software Foundation开发，最初于2005年发布。它是用Erlang编写的。

2. MariaDB：
MariaDB是一个开源关系数据库管理系统(RDBMS)，它是广泛使用的MySQL数据库技术的兼容即插即用替代品。它由MariaDB基金会开发，最初于2009年10月29日发布。MariaDB具有大量新功能，因此在性能和面向用户方面都更好。

CouchDB和MariaDB之间的区别：

S.NO.	CouchDB	MariaDB
1.	Developed by Apache Software Foundation and initially released in 2005.	Developed by MariaDB Foundation and initially released on 29 October 2009.
2.	CouchDB is written in Erlang.	MariaDB is written in C, C++, Perl and Bash languages.
3.	The primary database model for CouchDB is Document Store.	The primary database model for MariaDB is Relational DBMS.
4.	In CouchDB there is no predefined datatypes.	MariaDB have predefined datatypes such as float, date, number, etc.
5.	CouchDB does not supports XML data format.	MariaDB supports XML data format.
6.	CouchDB is Data Schema free.	In MariaDB Data Schema supports Dynamic columns.
7.	CouchDB supports Map Reduce method.	MariaDB does not supports Map Reduce method.
8.	CouchDB does not provides the concept of Referential Integrity. Hence, no Foreign Keys.	MariaDB provides the concept of Referential Integrity and have Foreign keys.
9.	CouchDB provides Eventual Consistency method to ensure consistency in a distributed system.	MariaDB provides Immediate Consistency method to ensure consistency in a distributed system.
10.	CouchDB does not supports ACID transactions.	MariaDB provides ACID transactions.
10.	Server operating systems for CouchDB are Android, BSD, Linux, OS X, Solaris and Windows	Server operating systems for MariaDB are FreeBSD, Linux, Solaris, Windows.
12.	Famous companies like Akamai Technologies, Hothead Games, Inc., GenCorp Technologies, Vivint Solar, etc uses CouchDB.	Famous companies like CUNY, Accenture, Docplanner, Grooveshark, Northrop Grumman, uses MariaDB.