Query optimization is an important technique for designing and implementing database management system ( dbms ) . it is a crucial factor that affects the capability of database . at present , this technique is successfully applied in all commercial databases 查询优化是数据库管理系统设计和实现所采用的一项重要技术,它是影响数据库性能的关键因素,当前所有商用数据库都成功采用了这项技术。
Hi the environment of microsoft visual c + + 6 . 0 and database management system ( dbms ) sql servert . o , the chinese version of window98 operating system , a fault diagnosis system is developed by using data mining methods , hi which visible rules are produced finally , the system is tested by experiment data of a rotaiy machinery 在windows98开发平台上,结合开发工具microsoftvisualc + + 6 . 0 , sqlserver数据库管理系统。采用面向对象的程序设计思想和模块化程序设计方法,对基于显式规则的几种数据挖掘方法进行了软件实现,开发了基于故障诊断的挖掘系统,该系统具有一定的实用价值。
Then a conclusion , that it is very necessary to construct mis based on database in order to advance enterprises ' s efficiency and ameliorate departments " management , was reached . keeping to the procedure of developing database application systems , underlying the development environment delphi 6 . 0 and relying on database management system ( dbms ) microsoft sql server 2000 , the system analysis and design on mis of nanjing logistics corporation were presented in detail 遵循数据库应用系统开发步骤,在开发环境delphi6 . 0基础上,以微软的数据库管理系统sqlserver2000为依托,本文系统地介绍了南京物流公司管理信息系统的系统分析与设计,并对该系统的关键技术作了分析,提出了有效的解决方案。
With the constant extension in applications of computer , the object - oriented and active performance is more notable , and the traditional database management system ( dbms ) already can " t meet the needs of many modern applications . to meet the needs , an active and object - oriented database management system ( aoodbms ) is designed in this thesis . several aspects are introduced as follows 随着计算机在应用中的不断扩展,在面向对象和主动性方面的要求也越来越多,传统的数据库系统已经无法满足现代的许多应用的需要,本文设计了一个主动面向对象数据库系统以满足这种需要,主要从以下几个方面进行了介绍:首先,本文分析了课题研究的背景、研究意义、研究历史和研究现状。