1. 数据：
Teradata 是 Teradata 公司生产的 RDBMS，用于管理大型数据仓库操作。 Teradata Corporation 是数据库和分析相关软件、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。
2. 沙发数据库：
CouchDB 是一个开源的面向文档的 NoSQL 数据库。它由 Apache 软件基金会开发，主要关注易用性。 Apache CouchDB 是最新的数据库品种之一。它是 2005 年发布的多主应用程序，并于 2008 年成为 Apache 项目。它使用多种格式和协议来存储、传输和处理其数据。它是用 Erlang 编程语言编写的。
Teradata 和 CouchDB 的区别：
| Teradata | CouchDB |
|---|---|
| It is developed by Teradata Corp. | It is developed by Apache Software Foundation. |
| It was released in 1984. | It was released in 2005. |
| Teradata server operating systems are Linux, hosted. | CouchDB server operating systems are Linux, OS X, Solaris, Windows. |
| The primary database model for Teradata is Relational DBMS. | The primary database model for CouchDB is Document Store. |
| Famous companies like Cognizant, Capgemini, aws, Cisco, Citibank, etc use Teradata. | Famous companies like Adobe, Amadeus, Lyft, ViaVarejo, Craftbase, etc uses CouchDB. |
| It provides us with Immediate Consistency method to ensure consistency in a distributed system. | It provides us with Eventual and Immediate Consistency method to ensure consistency in a distributed system. |
| It supports C, C++, Cobol, Java (JDBC-ODBC), Perl, PL/1, Python, R, Ruby. | It supports C, C#, C++, Clojure info, ColdFusion info, D info, Dart info, Delphi info, Erlang, Java, JavaScript, PHP, Python, Ruby. |
| It provide fine grained access rights according to SQL-standard. | It provides access rights for users and roles. |
| It supports both Master-Slave Replication and Master-Master Replication. | It supports Master-Slave Replication. |