PouchDB和Couchbase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驻留在浏览器内部，因此无需通过网络执行查询，因此它使其速度非常快。它在浏览器中使用IndexedDB和WebSQL在本地存储数据。

2. Couchbase：
Couchbase Server是一个开放源代码的分布式JSON文档数据库，为交互式应用程序提供了增强。它也被称为Membase。它由Couchbase，Inc.开发，最初于2010年8月发布。它使用C++，Erlang，C，Go语言编写，其服务器旨在为我们提供易于扩展的键值或JSON文档访问，且访问权限高。持续的吞吐量和低延迟。

PouchDB和Couchbase之间的区别：

S.NO.	PouchDB	Couchbase
1.	Developed by Apache Software Foundation.	Developed by Couchbase, Inc.
2.	It was initially released in 2012.	It was initially released on August 2010.
3.	It is written using Javascript language.	It is written using C++, Erlang, C and Go languages.
4.	It do not have SQL support.	It provides support to Declarative query language (N1QL) that extends ANSI SQL to JSON.
5.	It only provides Eventual Consistency method to ensure consistency in a distributed system.	It provides us with Eventual Consistency and Immediate Consistency methods to ensure consistency in a distributed system.
6.	It does not supports ACID transactions.	It supports ACID transctions.
7.	In PouchDB, there is no predefined datatypes.	Predefined datatypes of Couchbase are boolean, string, number, etc.
8.	It is server-less. It requires a JavaScript environment (browser, Node.js).	It have Linux, OS X and Windows as server operating systems.
9.	It supports JavaScript programming language.	It supports .NetC, Clojure, ColdFusion, Erlang, Go, Java, JavaScript, Perl, PHP, Python, Ruby, Scala, Tcl programming languages.
10.	It uses HTTP REST JavaScript API.	It uses Native language bindings for CRUD, Query, Search and Analytics APIs.