inventory database design

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

Simple database design and use (FMDB), database design fmdb There is a need: m users share n files, one user may use multiple files, one file may be used by multiple users; if a user leaves, this user will no longer use any files. If a file is not used by any user, the user will delete the file. When a user is known

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

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

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

Change to a single record of historical data: Common Database Design (2) -- change to a single record of historical data problems 1. Overview There is a type of data stored in the historical customer operation data, such as the bidding documents, the refining scheme list, the price change of the product price, and the change list. Such historical data includes a mainstream water meter that controls the fl

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

Abstract: The database is the foundation of the system. If you need to change the fields of the database frequently, or even modify the table and table relationship, I believe that no one will be able to cope with it several times! Because of the changes in the database structure, not only the changes in the database

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

Typically, there are two ways to judge whether a database is designed to be a comparison specification. One is to see if you have a large number of narrow tables, and the second is whether the number of wide tables is enough. If these two conditions are met, it can be explained that the standard level of the database is still relatively high. This, of course, is a two-a-kind indicator. In order to meet the

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

but the number is amazing, not easy to parse. On the surface, the above method is sufficient to achieve the function, simplify the database design and implementation of the complexity of this purpose, but there is a disadvantage, we are involved in the list of permissions are not independent of each other, but interdependent, such as the modification of permissions, in fact, including the permission to bro

level of privilege :4.1 in combination with the user's "role permission Level" + "corporate Identity" + "department identification" + "employee identification", go to the employee information sheet to find the appropriate employee, as follows: role Permission LevelValue:1. Company leaders: Find Employee Information sheet. Company Identity = = The user. Corporate identity > All Users;2. Department Leaders:Find Employee Information sheet. Companyidentity = = The user. Company logo Employee Inform

Label:I. Interface designRegardless of the student, teacher landing interface is unified, according to the user name entered to determine what kind of interface to enter.After the student login interface:Teacher interface: After the teacher login to the course name interface, select the course to get the second picture.Two. Class diagram designThree. Database designCourses: Course number , classes, teacher number, time, teacher, capacity, prerequisite

Label: Database Paradigm when designing the relational database, we should design a reasonable relational database to conform to different specifications, and the different norm requirements are called different paradigms, and the higher paradigm database