This chapter discusses the concepts and important principles in the object approach to databases. It discusses object identity, type constructors, encapsulation, type hierarchies, inheritance, polymorphism, and operator overloading. While it is not a complete picture, it will familiarize managers with ...
For this reason, this paper deals with object-relational databases implementation as part of informatics systems development. The practical implementation is made on a decision support system (DSS) prototype, which can be applied in the uncertain and unpredictable environments, like the production and ...
In this chapter we looked at the evolution of data models and compared the object and relational data models. We looked at some of the difficulties involved in fitting object-oriented systems and relational databases together, and we looked at how some w
object-oriented databasesE/R modelIn this paper, we propose a solution for the query translation between objectoriented and relational databases. The translation was accomplished through a schema transformer and a query translator. The mapping rules defined within the schema transformer describe the ...
databases (OODBs) and object-relational databases (ORDBs). OODBs use an object-oriented programming language as the database language and provide inherent support for the persistence of objects with typical database functionality. ORDBs extend relational databases by providing additional support for ...
网络对象关系数据库 网络释义 1. 对象关系数据库 未标题-1 ... 第8章 面向对象数据库 Object-Oriented Databases 第9章对象关系数据库Object-Relational Databases... xnps.gzhtcm.edu.cn|基于 1 个网页
APIs. Fundamental features of relational databases (e.g. primary keys, derived attributes, grouping queries and aggregate queries) which are usually missing from Object Oriented Databases are also supported by ObjectDB. The combination of Object Database features with Relational Database features brings...
Meyer, "XML and Object-Relational Database Systems--Enhancing Structural Mappings Based on Statistics," Proc. Third Int'l Workshop ... H Meyer,M Klettke - John Wiley & Sons, Ltd 被引量: 0发表: 2014年 [lecture notes in computer science] the world wide web and databases volume 1997 ||...
However, the object/relational hybrid model can provide more power, greater flexibility, better performance, and even higher data integrity than traditional relational models, particularly for databases that benefit from inheritance, creative data mining, flexible class interactions, or workflow constraints....
A example is given baesd on which ways from XML Schema to relational and object-relational database are implemented. 探讨了XML文档到数据库数据转换的方法,结合实例分别给出了基于XMLSchema的文档到关系数据库和对象-关系数据库转换的方法,可以在基于XML的数据交换和集成中得以应用。 更多例句>> 5...