1.甲骨文：
Oracle是一个关系数据库管理系统(RDBMS)。它由Oracle Corporation在1980年开发。它是第一个为网格计算而设计的数据库，它提供了最灵活，最具成本效益的方式来管理信息和应用程序。它可以在Windows，Unix，Linux和macOS等主要平台上运行。它是一个关系数据库，用户可以通过该数据库通过应用程序或称为SQL的查询语言来访问数据。
2. Couchbase：
Couchbase Server是一个开放源代码，分布式，多模型，NoSQL，面向文档的数据库软件包，已针对交互式应用程序进行了优化。它也被称为Membase。它由Couchbase，Inc.开发，最初于2010年8月发布。 Oracle和Couchbase之间的区别：
| S.NO. | Oracle | Couchbase |
|---|---|---|
| 1. | It was developed by Oracle Corporation in 1980. | It was developed by Couchbase, Inc. and initially released in August 2010. |
| 2. | It is written in C and C++. | It is written in C++, Erlang, C and Go languages. |
| 3. | It is a commercial software. | It is an open-source software. |
| 4. | Server operating systems for Oracle are Solaris, Linux, OS X, Windows. | Server operating systems for Couchbase are Linux, OS X and Windows. |
| 5. | The primary database model is Relational DBMS. | The primary database model for Couchbase is Document Store. |
| 6. | It uses Horizontal partitioning method for storing different data on different nodes. | It uses Sharding partitioning method for storing different data on different nodes. |
| 7. | Immediate Consistency method ensures consistency. | Eventual Consistency and Immediate Consistency methods ensures consistency in a distributed system. |
| 8. | It provides fine grained access rights according to SQL-standard. | It provides User and Administrator separation with password-based and LDAP integrated Authentication. |
| 9. | ACID properties of transaction are used. | It also provides ACID transactions. |
| 10. | The replication methods that Oracle supports are Master-Slave Replication, Master-Master Replication. | The replication methods that Couchbase supports are also Master-Slave Replication, Master-Master Replication. |