inventory database design

Tags: blog http java using OS IO file dataThis article reproduced: http://www.cnblogs.com/olartan/archive/2009/12/02/1615131.htmlChapter 1th IntroductionWhen the amount of data is large, the multiple tables are divided into different db first, then the data is distributed to different databases according to the key columns. After the library distribution, the system query, IO and other operations can have a group of multiple machines together to complete. This article is mainly aimed at, the mas

Get the analysis finished product demand is the line design UML (with class diagram) or the first design database? Reply content: Get the analysis finished product demand is the line design UML (with class diagram) or the first design

for convenient transportation. Of course, new products may be added to the e-commerce platform in the future. Now we have begun to design the product information table of the platform database. Each sold item has the same attributes, such as the product ID, product name, product category, related information, supplier, number of items included, inventory, purcha

The structure of a database (such as tables, relationships, views, and triggers) is called a database schema . You can use SQL statements to create these elements and arrange them in the way you want, but it can be confusing if you don't use graphical tools. PowerDesigner provides a graphical representation of the structure of a database. You can better modify th

The structure of a database (such as tables, relationships, views, and triggers) is called a database Mode。 You can use SQL statements to create these elements and arrange them in the way you want, but it can be confusing if you don't use graphical tools. PowerDesigner provides a graphical representation of the structure of a database. You can better modify the s

data redundancy. Second, the design of the commodity information table Assuming you are a developer at a department store computer, one day the boss asks you to develop an online E-commerce platform for the company, which has thousands of items for sale, but is currently only going to sell dozens of kinds of goods that are convenient to transport online, of course, In the future may be on the E-commerce platform to add new merchandise for sale. Th

Tags: details blog. com record identity meaning default cal otherDatabase design Level 3: Building Tables Stairway to Database Design level 3:building Tables Joe Celko, 3 months 9 days ( first published : 2010/05/25) The series This article is part of the stair series : The ladder of database

Part 2-Design tables and fields1. Check for various changesWhen designing a database, I will consider which data fields may change in the future. For example, the last name is like this (noteIt refers to the surname of a westerners, for example, the surname of a female after marriage ). Therefore, when establishing a system to store customer information, I tendStore the Last Name field in a separate data ta

a primary key(because it has no descendants), but must have a foreign key (because it has a father).The design of primary key and foreign key plays an important role in the design of global database. When the global database design is complete, there is an American

Requirement 1: avoid empty columns in the table. Although empty columns are allowed in the table, empty fields are special data types. Special processing is required during processing. In this case, the complexity of the database processing records will be increased. When there are many blank fields in the table, the database processing performance will be much lower under the same conditions. Therefore, al

contain additional business logic. (4) In the rule 4:mysql, ll_create, ll_modified use datetime types. (5) Rule 5: Prohibit the use of complex data types (arrays, custom types, etc.). (6) In rule 6:mysql, the satellite table ID is consistent with the primary table ID when the subordinate table is split. New primary key fields are not allowed in the satellite table. (7) In the rule 7:mysql, the table with outdated concept must have the expiration mechanism at the beginning of its

, such as the product ID, product name, product category, related information, supplier, number of items included, inventory, purchase price, sales price, and discount price. You will soon design four tables: wares_type, wares_provider, and wares_info) name type constraints description type_id Int No duplicate category ID, primary key type_name Char (50 ) It cannot be a null type name or repeated type_f

In recent work, we need to design a complete system, including B/S web services and databases, and the C/S structure of the application layer private communication protocol.ProgramModule, involving interaction with external databases and external modules. Because I am really a little bit of a design, and I am not familiar with database and web, after I have

These two weeks in the design of a survey database, now do a summary. Usually as a user, feel very simple a module, now participate in the design, although the feeling there are countless imperfect places, but the design time, or consider a lot of. Design of Questionnaire Mo

My first python web development framework (4) -- database structure design and creation, and python Structure Design After finishing the front-end html design, Tom immediately began to design the database structure. 　　 Before he s

Recently doing a simple quiz on the website The following four elements are now available person, topic, question, answer How to design a database (MySQL) People can focus on people, topics, problems Problems can have multiple topic tags The Feed Stream (Home page display) can be mixed to appear: The topic of my concern new issues New answers to the questions I care about Questions raised by people

Database Technology-database Naming and Design Specifications database development history has been using a somewhat mysterious system naming database table and field. In the original database management system (DBMS), the results

The database design method can be divided into four categories: visual design method, normative design method, CAD method and automatic design method. Among them, the New Orleans method is a kind of normative design method, which