1：Redis：
Redis 代表远程字典服务器，它是一个内存数据结构项目，实现了具有可选持久性的分布式内存键值数据库。 Redis 由 Redis 实验室开发，最初于 2009 年 5 月 10 日发布。它使用 ANSI 和 C 语言编写。 Redis 提供内存效率、运行速度快、高可用性，并提供一些特性，如可调性、复制、集群等。
2. 微软 SQL 服务器：
Microsoft SQL Server 是一个关系数据库管理系统 (RDBMS)，它依赖于平台，并且是基于 GUI 和命令的软件。它支持企业 IT 环境中的各种事务处理、商业智能和分析应用程序。它由微软公司开发，最初于 1989 年 4 月 24 日发布。它是用 C 和 C++ 语言编写的。
Redis 和 MS SQL Server 的区别：
| S.NO. | Redis | MS SQL SERVER |
|---|---|---|
| 1. | It is developed by Redis labs and initially released on May 10, 2009. | It is developed by Microsoft Corporation and initially released on April 24, 1989. |
| 2. | It is written in ANSI and C languages. | It is written in C and C++. |
| 3. | The primary database model for Redis is Key-Value store. | The primary database model for MS SQL Server is Relational DBMS. |
| 4. | The license for Redis is Open Source. | The license for MS SQL Server is Commercial. |
| 5. | It does not support XML data format. | It supports XML data format. |
| 6. | Redis is Data Schema free. | In MS SQL Server the data schema is Fixed. |
| 7. | It does not support SQL. | It can support SQL. |
| 8. | It does not have Triggers. | It has Triggers. |
| 9. | It does not have Foreign Keys. | It provides Foreign Keys for the Referential Integrity. |
| 10. | Server operating systems for Redis are BDS, Linux, OS X, Windows. | Server operating systems for MS SQL Server are Linux Windows. |
| 11. | Famous companies like Twinkl Educational Publishing, Merrill Corporation, ASOS.com Limited, Owler, Inc., etc uses Redis. | Famous companies like Citi, Bank of America, UPS, etc uses MS SQL Server. |