oltp database design

Label:In order to build a database with small redundancy and reasonable structure, we must follow certain rules when designing database. In a relational database, this rule is called a paradigm. A paradigm is a summary of a design requirement. In order to design a relational

1. Avoid empty columns in the table; 2. duplicate values or columns should not exist in the table; III:The record in the table should have a unique identifier.When designing a database table, the database administrator should develop a good habit of using an idnumber.It uniquely identifies a row record, rather than distinguishing records by names, numbers, and other fields. Each table should have an ID colu

ArticleDirectory 1. What are the problems caused by poor database design? 2. Example scenario 3. Summary 1. What are the problems caused by poor database design? In the conceptual design stage of the database, different

Last release: CYQ. DBImport V1.0 Introduction: CYQ. DBImport reverse engineering and batch import database tool V1.0 This release of V2.0 is intended for overseas attacks. The following is a description of this release. I. Introduction to new features of Version 2.0 1: fixed the GUID script error. 2: add processing. When the table for data import has no data, the table structure is also created. The original version needs to be manually created. 3

Summary: For database design, we generally start from the conceptual model. In the conceptual model design phase, we focus on analyzing the logical structure of data to avoid getting into the specific storage details, all designs are irrelevant to specific database products to be used in the future. This article is sui

http://blog.csdn.net/zxq1138634642/article/details/9121363 0, the process of using E-R method to design the database concept is discussed. A : the use of E-R method for database conceptual design, can be divided into 3 steps: First, the design of local E-R mode, and then th

1. Test the existing environment When designing a new database, you should not only carefully study the business needs, but also examine the existing system. Most Databases Projects are not built from scratch. Normally, there will always be existing systems within the Organization to meet specific needs (there may be no real Automatically calculated ). Obviously, the existing system is not perfect, otherwise you do not have to create a new system. H

A simple database design example and a simple database design example An example of database design in a simple management system, including design tables, ergraphs, modeling, and scri

General permission management design (database structure design) and permission management structure designI. Preface The application of the permission management system should be used in three different ways, A. Permission B. Assign permissions. C. Grant Permissions This article only analyzes the application levels of "Use Permission" and "assign permission", an

Introduction If you are not clear about the "three paradigms", please click here (FQ) to learn step-by-step what is "three normal". It is said that standard specification is an important guideline and is doing so, but remembering it as a mark on a stone can still cause trouble. The following 11 points are my top priority in database design. Rule 1: Figure out what the nature of the application will be devel

Design | data | database | Database design Some conceptions of database design (pattern and database design II) ;) Please give us m

Tags: Microsoft Difference Detail Related entity HTTP Contact process BSP21. Conceptual Design 1.1 key knowledge of conceptual design 1.2 Discrimination 　　The difference between an entity and an attribute: ① entities can be further described by multiple attributes, but not attributes, which are non-subdivided/segmented atoms. There is a connection between the ② entity or multiple entities, and the attribu

MYSQL database design and database design example (2) bitsCN.com database design-requirement analysis 1> The main task or function of requirement analysis is to investigate in detail the objects to be processed in the real world,

The task assigned by the teacher, let's create a database table for the personnel management project of a province to express which organizations have positions and who are not on duty. The information should be imported into excel data. when a tag is transferred out, it also indicates where it is to be transferred or when a new person is required to enter. if this person disappears, it needs to be deregistered. statistics should be made to determine

I. Introduction of relational database design paradigm 1.1 First normal form (1NF) no duplicate columns The so-called first normal form (1NF) means that each column of a database table is an indivisible basic data item and cannot have multiple values in the same column, that is, an attribute in an entity cannot have more than one value or cannot have duplicate a

scripts and database design documents] In addition, add the following technical issues:Problem: Some netizens reported that the time field was missing when MySql guided Sqlite. After local testing, we found that it was indeed gone. After multi-party verification, we found that the time field exists in mysql and is not available in other databases. Therefore, this is generally not used in cross-

Good habits of database design and use, good habits of Database Design Good habits need to be constantly cultivated and strengthened until they become a habit and then part of their thoughts. Before or after work, I want to read "three character classics" or "Di Zigui" for my little guy whenever I have time. He may not

used with the price, the prices are used cost, the link with the URL, the image with the image, points with point, record log with records, configuration with config, State with status, pattern mode with mode, classification are unified with category, class type unified with type, factory with factory, orders with order, users with user, admin with admin, password Password, comment Notes are used remark, Article article, news, imports with import, export with export, enable enabled, whether it

In fact, I have been preparing the basic materials for another blog post, but I chatted with my friends and asked me what I was doing recently. I said I was working on the System Log Module, after talking with him, this blog came into being. My blog directory: Index writing plan All data can be expressed as follows: ID, table name, column name, and value For example, there is a data entry into the user table: ID (guid, int for ease of understanding) Username Password Email

Tags: database designDatabase design (i)--Database design IntroductionAccording to the standard design, the database design process is divided into six stages:A, the system requirements