1. PostgreSQL 云分析数据库：
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 MPP(大规模并行处理)数据仓库服务，并通过阿里云进行了一些深度扩展。
2.Altibase：
Altibase 是一个开源关系数据库模型系统 (RDBMS)。 Altibase 的第一个版本称为 Spiner，于 1999 年发布。它是一个企业级、内存、混合、高性能 RDBMS。它由 Altibase 公司制造。它支持完整的 SQL 标准、功能和多版本并发控制 (MVCC)，还实现了模糊和乒乓检查点。阿里云 AnalyticDB for PostgreSQL 和 Altibase 的区别：
| S.NO. | Alibaba Cloud AnalyticDB for PostgreSQL | ALTIBASE |
|---|---|---|
| 1. | It was developed By Alibaba, Pivotal Software Inc. and PostgreSQL Global Development Group in 2016. | It was developed By Franz Inc. in 1999. |
| 2. | It is an online MPP (Massively Parallel Processing) data warehousing service based on Greenplum. | It is an enterprise grade, high-performance RDBMS. |
| 3. | In Alibaba Cloud AnalyticDB for PostgreSQL there are hosted server operating systems. | Server operating systems for Altibase are AIX, HP-UX and Linux. |
| 4. | The license of Alibaba Cloud AnalyticDB for PostgreSQL is commercial. | The license of Altibase is a open-source. |
| 5. | It supports XML Format. | It does not support XML Format. |
| 6. | It supports the Server-side scripting. | It supports stored procedures and stored functions. |
| 7. | It support partitioning methods. | The supported partitioning method is Sharding. |
| 8. | It supports SQL query language. | It uses ANSI SQL-92 as a query language. |
| 9. | It supports replication methods. | It also supports replication methods. |
| 10. | AnalyticDB for PostgreSQL provides the concept of Referential Integrity. Hence, there are Foreign Keys. | Altibase provides the concept of Referential Integrity. Hence, there are Foreign Keys. |
| 11. | It does not support in-memory capabilities. | It also does not support in-memory capabilities. |
| 12. | It does not offer any API for user-defined Map/Reduce methods. | It also does not offer any API for user-defined Map/Reduce methods. |
| 13. | It is available as a cloud service. | It is not available as a cloud service. |
| 14. | Programming languages supported are C, Java, Perl, Python and R. | Programming languages supported are C, C++ and Java. |