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. Amazon DynamoDB：
Amazon DynamoDB是具有高度可扩展性的文档数据库。它是由Amazon在2012年提供的。它具有主数据库模型，如文档存储和键值存储。它具有商业许可证。它使用事务并遵循ACID属性。具有备份功能，安全性高。 Amazon DynamoDB是一个持久而强大的数据库。它一天可以处理大量请求，并且得到了全面管理。
IBM DB2和Amazon DynamoDB之间的区别：
| S.NO. | IBM DB2 | Amazon DynamoDB |
|---|---|---|
| 1. | IBM DB2 is a relational database model. | Amazon DynamoDB is a key-value storage database model. |
| 2. | Pessimistic Locking model is there in IBM DB2. | Optimistic Locking model is there in Amazon DynamoDB. |
| 3. | IBM DB2 has schema. | It is free from schema. |
| 4. | It was developed by IBM in 1983. | It was developed by Amazon in 2012. |
| 5. | It supports AIX, HP-UX, Linux, Solaris, Windows, z/OS. | It supports all hosted operating system. |
| 6. | Foreign keys are present in IBM DB2. | It does not have foreign key concept. |
| 7. | It is not cloud based database. | It is cloud based database. |
| 8. | It uses SQL queries for processing query. | It does not have SQL queries. |
| 9. | It support server side scripts. | It does not support server side script. |
| 10. | It is considered more than Amazon DynamoDB in terms of ranking. | It is considered less than IBM DB2 in terms of ranking. |