1. MongoDB：
MongoDB 是一个开源的面向文档的数据库，用于大容量数据存储。它属于 NoSQL 数据库的分类。 NoSQL 工具意味着它不使用通常的行和列。 MongoDB 使用 BSON(文档存储格式)，它是 JSON 文档的二进制样式。
2. 亚马逊文档数据库：
Amazon DocumentDB 是一种商业许可数据库，它具有以下功能，因为它是一种支持 MongoDB 工作负载的快速、可扩展、高度可用且完全托管的文档数据库服务。它目前在 AWS 的加利福尼亚、俄勒冈、北弗吉尼亚和爱尔兰地区可用。它通过模拟响应来实现 Apache 2.0 开源 MongoDB 3.6 API。
MongoDB 和 Amazon DocumentDB 之间的区别：
| S.No. | MongoDB | Amazon DocumentDB |
|---|---|---|
| 1. | It is developed By MongoDB, Inc in 2009. | It is developed By Amazon in 2019. |
| 2. | It is Open Source. | It is commercial. |
| 3. | Server operating systems for MongoDB is Linux, OS X, Solaris, Windows. | Server operating systems for Amazon DocumentDB is hosted. |
| 4. | Its Primary database model is a Document store. | Its primary database model is also Document store. |
| 5. | It has predefined data type such as date or float. | It also has predefined data type such as date or float. |
| 6. | It supports read-only SQL queries via the MongoDB Connector for BI. | It does not support SQL. |
| 7. | APIs and other access methods for MongoDB is proprietary protocol using JSON. | APIs and other access methods for Amazon DocumentDB is proprietary protocol using JSON (MongoDB compatible). |
| 8. | Programming languages supported by MongoDB are Actionscript, C, C#, C++, Clojure, ColdFusion, D, Dart, Delphi, Erlang, Go, Groovy, Haskell, Java, JavaScript, Lisp, Lua, MatLab, Perl, PHP, PowerShell, Prolog, Python, R, Ruby, Scala, Smalltalk. | Programming languages supported by Amazon Redshift are Go, Java, JavaScript (Node.js), PHP, Python. |
| 9. | It supports Server-side scripting using JavaScript. | It does not support Server-side scripting. |
| 10. | It supports Triggers. | It does not supports Triggers. |
| 11. | It supports Partitioning methods using Sharding. | It has none Partitioning methods. |
| 12. | It does not provide the concept of Referential Integrity. Hence, there is no Foreign Keys. | It also does not provides the concept of Referential Integrity. Hence, there is no Foreign Keys. |
| 13. | It supports Multi-document ACID Transactions with snapshot isolation. | It supports Atomic single-document operations. |
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