hierarchical data model meaning in English
层次数据模型
分级数据模型
Examples
- The history of the development of database technology can be divided into three phases : the first generation is the reticulation / hierarchical data model based on database ; the second generation is the relational data model based database ; the third generation database which has the object oriented character breakthroughs the localization of the traditional database model which is unable to build model based on complex data structure . the third generation has led the database system to a new time
数据库技术的发展经历了三个阶段：第一代数据库系统是基于网状、层状数据模型的网状、层状数据库管理系统；第二代数据库是基于平面关系模型的关系数据库系统；以面向对象模型为代表的第三代数据库系统突破了传统数据模型在复杂数据建模和管理方面存在的局限性，使数据库系统进入了新的时代。