1. 第四维(4D)：
它是由 Laurent Ribardière 开发的关系数据库管理系统和 IDE。 4D 可以作为服务器运行，以便多个客户端可以管理单个数据库。 4D 创建于 1984 年，1987 年为 Macintosh 稍微延迟了公开发布。它是一个具有集成数据库管理系统的应用程序开发环境。
2. 活动枢轴：
它是一种内存 DBMS，结合事务处理和分析处理来处理不断变化的数据的聚合。它使用带有字典压缩和Java对象二进制表示的列式存储架构。它是法国公司 ActiveViam 的核心产品之一——曾被称为 Quartet FS，该公司成立于 2005 年。
4D 和 ActivePivot 的区别：
| S.NO. | 4D | ACTIVEPIVOT |
|---|---|---|
| 1. | Developed By 4D, Inc on 1984. | Developed By ActiveViam. |
| 2. | It is an application development environment with integrated database management system. | It is an in-memory DBMS combining transactional and analytical processing to handle the aggregation of ever-changing data. |
| 3. | 4D is written in C and C++ languages. | ActivePivot is written in Java language. |
| 4. | The primary database model for 4D is Relational DBMS. | The primary database model for ActivePivot is Object oriented DBMS. |
| 5. | It does not support In-memory capabilities. | It supports In-memory capabilities. |
| 6. | In 4D, there is no partitioning method. | In ActivePivot, partitioning can be done by Sharding and horizontal partitioning. |
| 7. | It support for concurrent manipulation of data. | It support for concurrent manipulation of data with multi-version concurrency control (MVCC). |
| 8. | It supports the Server-side scripts. | It also supports the Server-side scripts with Post-processors in Java. |
| 9. | It supports SQL query language. | It also supports SQL query language with Multidimensional Expressions (MDX). |