1. MongoDB：
MongoDB是用于大量数据存储的面向文档的开源数据库。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)，这是JSON文档的二进制样式。
2. Teradata：
Teradata是Teradata Corp.生产的RDBMS。它用于管理大型数据仓库操作。 Teradata Corporation是与数据库和分析相关的软件，产品和服务的提供商。它接受来自多个客户端应用程序的请求数量。
MongoDB和Teradata之间的区别：
| SR.NO | MongoDB | Teradata |
|---|---|---|
| 1 | It is developed by MongoDB Inc. in 2009. | It is developed by Teradata Corp. in 1984. |
| 2 | MongoDB server operating systems are Linux, OS X, Solaris, Windows. | Teradata server operating systems are Linux, hosted. |
| 3 | The primary database model for MongoDB is Document Store. | The primary database model for Teradata is Relational DBMS. |
| 4 | It is a open source software framework. | It runs world’s largest commercial databases. |
| 5 | Famous companies like Adobe, Amadeus, Lyft, ViaVarejo, Craftbase, etc uses MongoDB. | Famous companies like Cognizant, Capgemini, aws, Cisco, Citibank, etc use Teradata. |
| 6 | It support multi-document ACID Transactions with snapshot isolation. | It support ACID transactions. |
| 7 | It provides us with Eventual and Immediate Consistency method to ensure consistency in a distributed system. | It provides us with Immediate Consistency method to ensure consistency in a distributed system. |
| 8 | It supports Master-Slave Replication. | It supports both Master-Slave Replication and Master-Master Replication. |
| 9 | It supports C, C#, C++, Clojure info, ColdFusion info, D info, Dart info, Delphi info, Erlang, Java, JavaScript, PHP, Python, Ruby. | It supports C, C++, Cobol, Java (JDBC-ODBC), Perl, PL/1, Python, R, Ruby. |
| 10 | It provides access rights for users and roles. | It provide fine grained access rights according to SQL-standard. |