1. IBM DB2：
IBM DB2是一个关系数据库，由IBM于1983年开发。它被认为是为AI构建的一系列数据库管理产品。它具有执行事务的增强功能。它基于ACID原理工作，具有很高的灵活性和性能。它具有高效的备份功能，并且被认为非常安全。它非常可靠，并且受到Linux，Unix和Windows操作系统的支持。它具有商业许可证，并且具有高可伸缩性。
2. MongoDB：
MongoDB是面向文档的数据库模型，是一个开源软件。它由MongoDB Inc.在2009年开发。它以C++语言实现。 MongoDB使用JSON之类的文档。它可以用作独立程序，并提供备份功能。它具有很高的排名，并且在数据库中非常受欢迎。它还由用户定义的Java脚本功能组成。在MongoDB中，扩展是通过使用分片水平进行的。
IBM DB2和MongoDB之间的区别：
| S.NO. | IBM DB2 | MongoDB |
|---|---|---|
| 1. | IBM DB2 is a relational database model. | MongoDB is a document oriented database model. |
| 2. | Pessimistic Locking model is there in IBM DB2. | Optimistic Locking model is there in MongoDB. |
| 3. | It has more efficient backup functionality as compared to Maria DB. | It has comparatively less efficient backup functionality. |
| 4. | It was developed by IBM in 1983. | It was developed by MongoDB Inc. in 2009. |
| 5. | It is a commercial software. | It is a open source software. |
| 6. | It involves in place updates. | It doesn’t involve in place updates. |
| 7. | It uses triggers for insert, update and delete events. | It doesn’t use triggers for insert, update and delete events. |
| 8. | It is implemented in C and C++ languages. | It is implemented in C++ language. |
| 9. | It cant be used in standalone program. | It can be used in standalone program. |
| 10. | It is considered less than MongoDB in terms of ranking. | It is considered better than IBM DB2 in terms of ranking. |