1. 第四维(4D):
第四维是由 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。
1. 自适应数据库系统(ADABAS):
ADABAS 由 Software AG 开发,可在 IBM 大型机上运行。它于 1971 年推出。它是一个 OLTP – 用于大型机和 Linux/Unix/Windows 环境的 DBMS。 ADABAS 是一种企业数据库管理系统 (DBMS),专为可靠性、高性能、可扩展性和低总体拥有成本而设计。
4D 和 ADABAS 的区别:
S.NO. | 4D | ADABAS |
---|---|---|
1. | Developed By 4D, Inc on 1984. | Developed By Software AG on 1971. |
2. | It is an application development environment with integrated database management system. | It is an OLTP – DBMS for mainframes and Linux/Unix/Windows environments. |
3. | It is written in C and C++ languages. | It is written in Natural language. |
4. | Server operating systems for 4D are OS X and Windows. | Server operating systems for ADABAS are BS2000, Linux, Unix, Windows, z/OS and z/VSE. |
5. | It support XML Format. | It does not support XML Format. |
6. | It support the Server-side scripting. | Server-side scripting is done in Natural. |
7. | There is no Partitioning methods. | It supports partitioning methods. |
8. | It supports SQL query language. | It also supports SQL query language with add-on product ADABAS SQL Gateway. |
9. | It support only one replication methods – Master-master replication. | It also supports partitioning with add-on product Event Replicator. |
10. | It provides the concept of Referential Integrity. Hence, no Foreign Keys. | It does not provides the concept of Referential Integrity. Hence, no Foreign Keys. |