inventory database design

Tags: performance selection memcached style HTTP under Good information fetch numberWhen you design a database, a field belongs to one table, but it appears in the other or more tables at the same time, and is exactly the same as the meaning of the table it belongs to, then this field is a redundant field. --These are the definitions I gave myself. Is the existence of redundant fields good or bad ( Redunda

3 efficient Tags tag system database design solutions, tags design solutions Background Currently, mainstream blog systems and CMS all have a TAG Tag system, which not only enhances the structure of content links, but also allows articles to be distinguished by tags. Compared with the traditional Keyword mode, this Tag mode can independently

ID card numbers. However, when an employee reports, his/her ID card may be missing. Therefore, the ID card number field is often not provided in a timely manner. Therefore, the ID card number field can be empty to meet the needs of these special circumstances. However, some processing can be done during database design. If no content is entered, set the default value of this field to 0 or N/. To avoid null

Label:"The work of physical design"① Choosing the Right Database management system: Oracle,sqlserve,mysql,pgsql② defining naming conventions for databases, tables, and fields③ Select the appropriate field type according to the selected DBMS system④ Anti-Normalization design-consider reading efficiency and adding appropriate redundancy in some tables (space change

I am currently working on a simple Q A website with the following four elements: Topics, questions, and answers to questions about how to design a database (MySQL, you can have multiple topic tags to feed the stream (displayed on the homepage). The following is a question added to my topic... recently, I am working on a simple Q A website. The following four elements are available: People, topics, quest

department2, the domain can be a module, can be a page, or it can be a button on the page3, the permission can be "visible", can be "read-only" or "available" (such as a button can be clicked)is actually the WHO, what, how problemSo the six tables mentioned above can actually design a table:IV, example descriptionHere is an example of a design description. "User, role on page is permission to use"Detailed

recommend this method instead of opening another page. To edit the entire table at the same time, you can use the cell editing mode of the table, such as the order editing page-Order Details table in the system] System introduction-Permission Center The design concept is the same as that of the same version. It uses [user], [role] =, [module], and [function] Permission control. For more information, see my previous introduction: general pe

Everything has a life cycle, of course, the database system is no exception! Database design and ER model This chapter is mainly based on the life cycle of the database system, the design phase of which to explain.Let's take a look at the life cycle of the

Label:Design of questionnaire module of database design 1 2016/07/13 Update The entire internship has come to an end, in fact, the entire Questionnaire module database design, in early June basically has been finalized and realized. This summary is divided into two parts. One, to the previous proposed a few legacy issu

Label: MongoDb compared to the traditional SQL relational database, the biggest difference lies in their schema design (schema) differences, it is because this level of differences derived from other aspects of the difference. we can simply think that the relational databaseconsists of three hierarchical concepts of database, table and record, while in constructi

Web rights design, do the right now there are three main ways to implementFirst Type: manual implementationConfigure 2 interceptors, one is to intercept whether to login, one is to intercept the URL permissions, through the role of the Permissions table configuration, the path of the permission URL and access to the URL of the resource to matchThe second type: spring-security implementation, heavy, not recommendedChapter III: Shiro, currently spring h

As a data container, the database not onlyProgramPerformance has a great impact on application expansion. therefore, for applications, a well-designed database is very important. how can we design a database with good performance and support for expansion? This is a question that we all need to explore. there are many

Three major database design paradigms and three database paradigms In order to establish a database with low redundancy and reasonable structure, certain rules must be followed when designing the database. In relational databases, such a rule is called a paradigm. The parad

Mysql database sharding application scenarios and design methods, mysql database sharding Many of my friends asked me in the Forum and in the message area when mysql was required to perform database/table sharding and what design method was the best choice. Based on these qu

purpose of each field and any aliases that may exist. This is absolutely necessary for the documentation of SQL expressions. 5 Define standard Object naming conventions The naming of various objects in the database must be canonical. 2. Table and field design (Database logic design) Table

schema design of database table with tree-shaped structure In the process of programming, we often use the tree structure to characterize the relationship of some data, such as Enterprise's subordinate departments, column structure, commodity classification and so on, usually, these tree-like structures need to use the database to complete the persistence. Howev

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 table, an

Design and Implementation of multi-user permission Control for Web application systems-database design [2]: multi-user permission Control To build a Web permission Configuration System, you need the following five data tables: Personnel table, group table, page table, directory table, and Operation permission table. The IDS used in each data table are the IDs of

Chapter 1 design database applications Database applications allow users to interact with information stored in the database. The database provides an information structure for different applications to share.Delphi 4 supports relational databases. Relational databases organ

Database System life cycleThe development of database application system is a software engineering, generally has the information collection, the organization, the processing, the extraction, the synthesis, the dissemination and so on function, but has own characteristic, therefore is called the database project . Database