1. 阿里云 AnalyticDB for PostgreSQL ：
AnalyticDB是阿里云上的在线分析处理数据库系统。它提供 PostgreSQL 和 MySQL 版本。 AnalyticDB for PostgreSQL 是基于 Greenplum 开源数据库程序的在线大规模并行处理 (MPP) 数据仓库服务，并由阿里云进行了一些深度扩展。
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。
阿里云 AnalyticDB for PostgreSQL 和 Amazon SimpleDB 的区别：
| S.NO. | Alibaba Cloud AnalyticDB for PostgreSQL | Amazon SimpleDB |
|---|---|---|
| 1. | Developed By Alibaba, Pivotal Software Inc., and PostgreSQL Global Development Group in 2016. | Developed By Amazon in 2007. |
| 2. | It is an online MPP (Massively Parallel Processing) data warehousing service based on Greenplum. | It is a hosted simple database service by Amazon, with the data stored in the Amazon Cloud. |
| 3. | Its primary database model is Relational DBMS. | Its primary database model is the Key-value store. |
| 4. | The programming language supported are C, Java, PHP, R, and Python. | The programming language supported is .Net, C, C++, Erlang, Java, PHP, Python, Ruby, and Scala. |
| 5. | It supports the ACID property. | It does not support the ACID property. |
| 6. | It supports Server-side scripting. | It does not support the Server-side scripting |
| 7. | It supports partitioning methods. | It does not support partitioning methods. |
| 8. | It supports SQL query language. | It does not support the SQL query language. |
| 9. | It supports replication methods. | It supports replication methods with multi-availability zones for high availability. |
| 10. | It provides the concept of Referential Integrity. Hence, there are Foreign Keys. | It does not provide the concept of Referential Integrity. Hence, no Foreign Keys. |
| 11. | It supports the ACID property. | It supports Atomic single-document operations |