This paper presents how to exploit the application program of a Relational Model Database, and how to use the Relational Database on environmental testing.
介绍了一个关系模型数据库应用程序的开发以及该数据库在环境试验中的应用。
The paper introduces an Extended Relational Model Database System ERDB and a GIS based on ERDB. We mainly discuss the problems of expression of topology in GIS and recursive query.
本文介绍了一个扩展关系模型数据库系统ERDB和在该系统之上开发的一个GIS系统。
The paper introduces an Extended Relational Model Database System ERDB and a GIS based on ERDB. We mainly discuss the problems of expression of topology in GIS and recursive query.
本文介绍了一个扩展关系模型数据库系统ERDB和在该系统之上开发的一个GIS系统。
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