数据库相关记录行的分组检索

从dBASE应用软件使用对象的角度出发,本文探讨了解决具有多值性数据项库文件的分组检索问题。通过一个典型实例提出问题并进行了诸方案的简要分析。叙述了“分组检索”软件的设计思路—引入了“记录群”和“符合率”概念,在原库文件设计习惯的基础上,通过对检索条件集合的分解并判断记录群对条件的符合率,从而实现对记录群的检索。

THE GROUPING RETRIEVAL OF CORRELATIVE RECORD ROWS IN DATA BASE

From the angle of view of users who are using dBASE application software, this paper explores a method of grouping retrieval for a database file in which there are multivalued data terms. Both the problem is advanced by means of a typical example and the schemes are analyzed simply. It narrates the train of thoughts on the software design-brings in two conceptions-RECORD GROUP and COINCIDENCE RATE,decomposes the site of retrieval condition and judges the coincidence rate of a record group to all conditions, and then, carries out retrieving record groups on the basis of aceepted practice by which the original file has been designed.