1. Neo4j：
它是最著名的图形数据库管理系统，也是由Neo4j，Inc.开发的NoSQL数据库系统。它与Mysql或MongoDB不同，因为它具有使其功能与其他数据库管理系统相比特别的特点。 Neo4j还以图形形式存储和显示数据，而不是以表格格式或Jason格式。在这种情况下，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，这使得Neo4j在其他数据库管理系统中独树一帜。
2. MS SQL Server：
它是由Microsoft Corporation开发的关系数据库管理系统(RDBMS)，最初于1989年4月24日发布。它是用C和C++语言编写的。它是平台相关的，并且既是GUI也是基于命令的软件。它支持公司环境中的各种事务处理，分析应用程序和商业智能。
Neo4j和MS SQL Server之间的区别：
| S.No. | Neo4j | MS SQL Server |
|---|---|---|
| 1. | It was developed by Neo4j, Inc. | It was developed by Microsoft Corporation. |
| 2. | It was initially released in 2007. | It was initially released on April 24, 1989. |
| 3. | It is written using Java and Scala language. | It is written in C++ language. |
| 4. | Neo4j server operating systems are Linux, OS X, Solaris, and Windows. | For MS SQL Server, Server operating systems are Linux and Windows. |
| 5. | Its License is open source. | Its License is commercial. |
| 6. | Neo4j APIs and other access methods includes Bolt protocol, Cypher query language, Java API, Neo4j-OGM, RESTful HTTP, API, Spring Data Neo4j, TinkerPop 3. | APIs and other access methods include ADO.NET, JDBC, ODBC, OLE DB, Tabular Data Stream (TDS). |
| 7. | It does not support SQL. | It provides support to SQL. |
| 8. | Its primary database model is is Graph DBMS. | Its primary database model is Relational DBMS. |
| 9. | Neo4j supports programming languages which are .Net, Clojure, Elixir, Go, Groovy, Haskell, Java, JavaScript, Perl, PHP, Python, Ruby and Scala. | It supports C#, C++, Delphi, Go, Java, JavaScript (Node.js), PHP, Python, R, Ruby, Visual Basic programming languages. |
| 10. | It does not supports Partitioning methods. | In MS SQL Server tables can be distributed across several files (horizontal partitioning) and sharding is done through federation. |
| 11. | Neo4j is uesd by famous companies like medium.com., Stack, Fiverr, Fundamentei, Trendyol Group, double slash, ingsmen Software, GAPO, etc. | Famous companies like Bank of America, UPS, etc uses MS SQL Server. |