PostgreSQL和Amazon CloudSearch之间的区别

1. PostgreSQL：
PostgreSQL是一个功能强大的开源对象关系数据库系统。它具有较高的稳定性，因此可以在较低的维护工作量下提供良好的性能。 PostgreSQL是第一个实现多版本并发控制(MVCC)功能的DBMS。

2. Amazon CloudSearch：
它是可扩展的基于云的搜索服务，是Amazon Web Services的一部分。它是Amazon的托管搜索引擎服务，数据存储在Amazon云中。该数据库支持34种语言，其功能包括突出显示，自动完成和地理空间搜索。

PostgreSQL和Amazon CloudSearch之间的区别：

S.No.	PostgreSQL	Amazon CloudSearch
1.	It is developed By PostgreSQL Global Development Group on 1989.	It is developed By Amazon in 2012.
2.	It is Open Source.	It is commercial.
3.	Server operating systems for PostgreSQL is FreeBSD, HP-UX, Linux, NetBSD, OpenBSD, OS X, Solaris, Unix, Windows.	Server operating systems for Amazon CloudSearch is hosted.
4.	Its Primary database model is a Relational DBMS.	Its primary database model is a Search engine.
5.	It has predefined data type such as date or float.	It also has has no predefined data type such as date or float.
6.	It supports SQL.	It does not support SQL.
7.	APIs and other access methods for PostgreSQL is ADO.NET, JDBC, native C library, ODBC, streaming API for large objects.	APIs and other access methods for Amazon CloudSearch is HTTP API.
8.	It supports ACID properties.	It does not support ACID properties.
9.	It supports Server-side scripting using user defined functions.	It does not support Server-side scripting.
10.	It supports Triggers.	It does not support Triggers.
11.	It supports Partitioning methods using partitioning by range, list and (since PostgreSQL 11) by hash.	It also supports Partitioning methods.
12.	It provides the concept of Referential Integrity. Hence, there is Foreign Keys.	It does not provides the concept of Referential Integrity. Hence, there is no Foreign Keys.