1. IBM DB2：
IBM DB2 是 IBM 于 1983 年开发的关系型数据库。它被认为是为 AI 构建的数据库管理产品家族。它具有增强的执行交易的能力。它基于ACID的原理工作，具有很高的灵活性和性能。它具有高效的备份设施，被认为非常安全。它非常可靠，并得到 Linux、Unix 和 Windows 操作系统的支持。它具有商业许可证，具有很高的可扩展性。
2. MongoDB：
MongoDB 是一个面向文档的数据库模型，它是一个开源软件。它由 MongoDB Inc. 于 2009 年开发，使用 C++ 语言实现。 MongoDB 使用像 JSON 这样的文档。它可以用作独立程序并提供备份功能。它的排名很高，在数据库中很受欢迎。它还包含用户定义的Java脚本函数。在 MongoDB 中，扩展是通过使用分片水平完成的。
IBM DB2 和 MongoDB 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. |