PouchDB和MongoDB之间的区别

1. PouchDB：
PouchDB是一个开源的NoSQL嵌入式数据库。它是在CouchDB之后设计的，CouchDB是为npm提供支持的NoSQL数据库。它是用JavaScript语言编写的。由于PouchDB驻留在浏览器中，因此无需通过网络执行查询，因此它的速度非常快。它在浏览器中使用IndexedDB和WebSQL在本地存储数据。

2. MongoDB：
MongoDB是一个跨平台的面向文档的非关系(即NoSQL)数据库程序。它是一个开放源代码文档数据库，以键值对的形式存储数据。 MongoDB由MongoDB Inc.开发，最初于2009年2月11日发布。它使用C++，Go，JavaScript， Python语言编写。 MongoDB提供高速，高可用性和高可伸缩性。 PouchDB和MongoDB之间的区别：

SR.NO	PouchDB	MongoDB
1.	It is developed by Apache Software Foundation.	It is developed by MongoDB Inc.
2.	It was released in 2012.	It was released on 11 February 2009.
3.	PouchDB server operating systems are server-less and require a JavaScript environment (browser, Node.js).	MongoDB Server operating systems are Solaris, Linux, OS X and Windows.
4.	It is written using Javascript language.	It is written in C++, Go, JavaScript, Python languages.
5.	It does not provide ACID transactions.	It provides Multi-Document ACID transactions with snapshot isolation.
6.	The primary database model for PouchDB is Document Store.	The primary database model for MongoDB is also Document Store.
7.	It does not support predefined data types.	It supports predefined data types such as string, integer, double, decimal, boolean and date.
8.	It supports Map Reduce method.	It also supports Map Reduce method.