1 Introduction
Engineering database system and traditional database system, including engineering database management system and engineering database design of two aspects. The main task of engineering database
5-2 Database DesignBasic steps
Steps:1. Requirements Analysis PhaseThe database design must first understand and analyze the user needs accurately. Demand analysis is the foundation of the entire design process and is the most difficult and time-consuming step.2. Conceptual structure
Since the beginning of 1980s, many computer experts in China have gone deep into some large enterprises and tried to develop the ideal large-sized MIS. Practice has proved that most of the large MIS developed are not ideal. Why? According to my opinion, one of the important reasons is that I did not pay enough attention to the database design of MIS during the development process and did not take it as a to
The first thing to do in object-oriented program development is to analyze the data to be processed in the entire program, extract the abstract template from it, and design the class with this abstract template, then, add a function (algorithm) to process the data. Finally, assign access permissions to the data members and functions in the class to encapsulate the data. The original prototype of the database
This document does not describe how to use powerdesigner, but describes how to design a database system better by combining the features of powerdesigner with database design methods.
Use powerdesigner to design databases
As one of the Case tools for
it has no children), but you must have a foreign key (because it has a father ).The Design of primary keys and Foreign keys plays an important role in the design of global databases. After the design of the global database is complete
Database
key (because it has no children), but you must have a foreign key (because it has a father ).The Design of primary keys and Foreign keys plays an important role in the design of global databases. After the design of the global database is complete
Database
14 key skills in Database Design
1. Relationship between original documents and entities
It can be a one-to-one, one-to-many, and many-to-many relationship. In general, they are a one-to-one relationship: an original document corresponds to only one entity. In special circumstances, they may be one-to-many or many-to-one relationships, that is, an original document corresponds to multiple entities, or mu
The following 14 skills, is a lot of people in a large number of database analysis and design practice, gradually summed up. The use of these experiences, readers can not help hard sets, rote memorization, and to digest understanding, pragmatic, flexible grasp. and gradually achieve: in the application of development, in the development of the application.1. Relationship between the original document and th
Label:DirectoryThe origin of a Codd RDBMS12 law--rdbms Design phase of two-relational database Three design principles Four naming rules Database design, a cornerstone of the success of a software project. Many practitioners agree that d
Label:Transferred from: http://www.cnblogs.com/MeteorSeed/archive/2013/03/27/2880054.html ------------------------------------------------------------------------------------- Directory The origin of a Codd RDBMS12 law--rdbms Design phase of two-relational database Three design principles Four naming rules Database
child), but must have a foreign key (because it has a parent ).The Design of primary keys and Foreign keys plays an important role in the design of global databases. After the design of the global database was completed, an American database
no child), but must have a foreign key (because it has a parent ).
The Design of primary keys and Foreign keys plays an important role in the design of global databases. After the design of the global database was completed, an American database
From: http://topic.csdn.net/u/20080410/14/75349788-94f6-4182-a798-8c35bdb80c40.html
The following fourteen skills are gradually summarized by many people in a large number of database analysis and design practices. For the use of these experiences, readers should not be able to stick to them, but should digest and understand them, be realistic, and be flexible. And gradually achieve: Development in the appl
Library design skills 14-NET Abstract (from: http://blog.csdn.net/wentasy/article/details/7538169
)
The following 14 database design skills are gradually summarized by many people in a large number of database analysis and design practices. The use of these
Tags: database designDatabase design process and data description1. Requirements Analysis Phase (accurate understanding and analysis of user needs including data and processing)2. Conceptual structure design phase (to form an independent DBMS conceptual model by synthesizing, generalizing and abstracting the user's needs)3. Logical Structure
The following 14 database design skills are gradually summarized by many people in a large number of database analysis and design practices. The use of these database design experience is flexible and gradually achieved: Developme
has no child), but must have a foreign key (because it has a parent ).The Design of primary keys and Foreign keys plays an important role in the design of global databases. After the design of the global database was completed, an American database
Theories and Methods of Database Design
1 Database Design Overview
Database is the latest technology in data management, with Data structuring, minimum redundancy, and high
Program Data independence, scalability, and ease of compiling applications. So-called
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