摘要
目前,简单的关系数据库与面向对象模型都不能满足用户对数据的管理应用要求,因此,面向对象的关系数据库应运而生。同时为了对空间数据库进行高效的查询、管理,产生了空间查询语言(GSQL)。本文主要进行了空间查询语言的初步探索,详细地阐述了在OpenGIS矢量数据模型上的GSQL语言的扩展过程,其中包括在Oracle中创建空间数据类型、空间函数的方法,并进行了详细的举例说明。
The simple relational database with object-oriented model can not meet the application requirements of the user data management.Therefore,the object-oriented relational database came into being.Meanwhile,in order to query and manage spatial database efficiently,the geometric structured query language（GSQL） was produced.What this article carried out is mainly the preliminary exploration of the spatial query language.Also it elaborates in expansion of the OpenGIS vector data model GSQL language,including spatial data types created in the Oracle,spatial functions,methods,and detailed examples.
出处
《测绘与空间地理信息》
2013年第7期142-145,148,共5页
Geomatics & Spatial Information Technology
