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。它是用 ANSI 和 C 语言编写的。 Redis 提供了内存效率、运行速度快、高可用性，并提供了一些特性，如持久性、复制、集群等。
2. MySQL：
MySQL 是一种基于结构化查询语言 (SQL) 的开源关系数据库管理系统 (RDBMS)。它由oracle 公司开发和管理，于1995 年5 月23 日首次发布。它被广泛应用于许多小型和大型工业应用程序，能够处理大量数据。
Redis 和 MySQL 的区别：
| S.No. | REDIS | MYSQL |
|---|---|---|
| 1. | It was developed by Redis labs and initially released on May 10, 2009. | It was developed by Oracle and released on May 1995. |
| 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 MySQL is Relational DBMS. |
| 4. | It is Data Schema free. | In MySQL Data Schema is fixed. |
| 5. | It does not support XML data format. | It supports XML data format. |
| 6. | It supports secondary indexes with RediSearch module only. | It supports secondary indexes without any restrictions. |
| 7. | It has no Triggers. | It supports Triggers. |
| 8. | It does not provide the concept of Referential Integrity. Hence, no Foreign Keys. | It provides concept of Referential Integrity and have Foreign keys. |
| 9. | Server operating systems for Redis are BDS, Linux, OS X and Windows. | Server operating systems for MySQL are FreeBSD, Linux, OS X, Solaris, Windows. |
| 10. | Famous companies like Twinkl Educational Publishing, Merrill Corporation, ASOS.com Limited, Owler, Inc., etc use Redis. | Famous companies like Airbnb, Pinterest, Slack, Udemy, Twitter, etc uses MySQL. |