PouchDB和Neo4j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. Neo4j：
Neo4j是最著名的图形数据库管理系统，它也是Neo4j，Inc.开发的NoSQL数据库系统。Neo4j与Mysql或MongoDB有所不同，因为它的功能使其与其他数据库管理系统相比显得特别。 Neo4j以图表形式存储和显示数据，而不是以表格格式或以Jason格式显示。在这里，整个数据由节点表示，您可以在节点之间创建关系，这意味着整个数据库集合将看起来像一个图形，这使其在其他数据库管理系统中独树一帜。

PouchDB和Neo4j之间的区别：

S.NO.	PouchDB	Neo4j
1.	It is developed by Apache Software Foundation.	It is developed by Neo4j, Inc.
2.	PouchDB was initially released in 2012.	Neo4j was initially released in 2007.
3.	It is written using Javascript language.	It is written using Java and Scala language.
4.	PouchDB is server-less. It requires a JavaScript environment (browser, Node.js).	Neo4j Server operating systems are Linux, OS X, Solaris, and Windows.
5.	It provides us with Eventual Consistency method to ensure consistency in a distributed system.	It provides us with Causal and Eventual Consistency configurable in Causal Cluster setup and Immediate Consistency in stand-alone mode to ensure consistency in a distributed system.
6.	In PouchDB there is no predefined datatypes.	Neo4j have predefined datatypes such as float, date, etc.
7.	PouchDB supports Map Reduce method.	Neo4j does not supports Map Reduce method.
8.	It does not provides the concept of Referential Integrity. Hence no Foreign Keys.	It provides the concept of Referential Integrity. Hence have Foreign Keys.
9.	It does not provides ACID transactions concepts.	It provides ACID transactions concepts.
10.	PouchDB primary database model is Document Store.	Neo4j primary database model is is Graph DBMS.
11.	It supports Javascript programming language.	Neo4j supports .Net, Clojure, Elixir, Go, Groovy, Haskell, Java, JavaScript, Perl, PHP, Python, Ruby, Scala programming languages.
12.	PouchDB supports both Master-Slave Replication and Master-Master Replication.	It supports Causal Clustering using Raft protocol Replication.
13.	It supports Sharding Partitioning methods.	It does not supports Partitioning methods.
14.	APIs and other access methods includes HTTP REST, JavaScript API.	APIs and other access methods includes Bolt protocol, Cypher query language, Java API, Neo4j-OGM, RESTful HTTP, API, Spring Data Neo4j, TinkerPop 3.