1. 亚马逊动态数据库：
Amazon DynamoDB 是一个完全托管的数据库，支持文档和键值数据模型。功能如下 – 快速灵活的 NoSQL 数据库服务，适用于需要一致的、任何规模的个位数毫秒延迟的所有应用程序。它是 Amazon 托管的、可扩展的数据库服务，数据存储在 Amazon 云中。
2. 亚马逊简单数据库：
它是亚马逊托管的简单数据库服务，数据存储在亚马逊云中。 Amazon 是一项网络服务，用于实时对结构化数据运行查询。这个数据库是由 Amazon.com 用 Erlang 编写的。它具有以下特点——高可用性和灵活性，很少或没有管理负担。
Amazon DynamoDB 和 Amazon SimpleDB 之间的区别：
| S.NO. | Amazon DynamoDB | Amazon SimpleDB |
|---|---|---|
| 1. | Developed By Amazon in 2012. | Developed By Amazon in 2007. |
| 2. | It is a hosted, scalable database service by Amazon with the data stored in the Amazon cloud. | It is a hosted simple database service by Amazon, with the data stored in the Amazon Cloud. |
| 3. | It supports the ACID property. | It does not support the ACID property. |
| 4. | It supports predefined data types such as float or date | It does not support predefined data types such as float or date |
| 5. | Its Primary database model is Document store and Key-value store. | Its primary database model is the Key-value store. |
| 6. | It does not offers an API for user-defined Map/Reduce methods. But maybe implemented via Amazon Elastic MapReduce (Amazon EMR). | It does not offer an API for user-defined Map/Reduce methods. |
| 7. | It supports sharding as a partitioning method. | It does not support partitioning methods. |
| 8. | It supports secondary indexes. | It also supports secondary indexes and all columns are indexed automatically. |
| 9. | The programming languages supported are .Net, ColdFusion, Erlang, Groovy, Java, JavaScript, Perl, PHP, Python, and Ruby. | The programming languages supported are .Net, C, Erlang, C++, Java, PHP, Python, Scala, and Ruby. |