简阳市农业资源数据库结构初探

A Preliminary Approach in the Structural Design of Agriculture Database in Jianyang City

实体联系(ER)法是运用比较广泛的数据库结构设计的方法。从分析简阳市人口、耕地、水、气候、生物等农业资源入手,通过确定数据字典、实体类型、联系类型、设计出ER图、确定属性、优化ER图并导出关系数据模型、设计记录格式这一系列流程阐述了如何利用ER方法进行简阳市农业资源数据库结构的设计。图1,表3,参12。

The entity-relation （ER） method is widely used for the database structure design. This article starts from analyzing population of Jianyang City, arable land, water, climate, biological and other agricultural resources, while identifying data dictionary, entity type; contact type, designing an ER map, determining attribute, optimizing ER map, exporting data model relationship, design process recording format of this series. With these we describes how to use ER methods to design Jianyang City agricultural resource database structure.