logical database design

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

describes the principles of database design. 1. database design requires at least 40% of the project development time The database is the intuitive response and performance of requirements. Therefore, the database must meet the n

customers and their related orders may have two tables: customerAnd order. The Order table is not a package.Contains any information about the customer associated with the order, but the table stores a key value that points to the customer table containing the customer information.There are also higher levels of standardization, but will higher standards be better? The answer is not necessarily. In fact, for some projectsEven 3nf can introduce too much complexity to the

authentication and some single log-in. This is thesis main contents include system demand analyse, overall design, database design and detailed design and Realizat Ion of data access layer. First, the introduction For each application system inside the campus, users must register in each system, login, more troub

The origin of a Codd RDBMS12 law--rdbmsDesign phase of two-relational databaseThree design principlesFour naming rulesDatabase design, a cornerstone of the success of a software project. Many practitioners agree that database design is not really that important. The reality of the scene is quite similar, the number of

Tags: jobs macwindowcontentsep atl database application plug-in feature Generation of database table design, generation of SQL statements, generation of database projects, generation of MySQL database First, training purposes through comprehensive training to further c

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

Recently in learning database design suddenly be conscious of the understanding of some ideas, horizontal design, vertical design, this is probably to meet the first few paradigms I don't quite understand, but I want to summarize some experience in my own way. The total well-known data table is a ' row ' and ' column

Information System of a large enterprise or a public institution. It includes all topics of the enterprise, the design, use, and maintenance of such databases are complex and require high designers, users, and DBAs. II. General Database Design Methods Database design involv

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

ObjectiveThe database design knowledge that was not familiar before was picked up and a simple knowledge comb was made. It was previously thought that database design was nothing more than creating a database, building a table, adding fields, determining the type of a field

Label:SceneWhen we use the database, we often encounter menu options, such as the Personal information table: "Gender": male, female, "education": Junior college, College, undergraduate, master and above; English level: English four, English six, professional eight; These menu options must be maintained in the database, When there are many data tables, the menu options may reach hundreds, so how do you

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

Tags: Time table transaction post customer service sharing cannot SSI"The beginning of the database design classic", is now learning this book, although the previous read a similar book, may be due to previous experience, some of the book said something only digested part, now relive side understood more. So read the first time read do not understand it does not matter, after a a year to read again, or will

1. Design investigation Option processing- time to use Hibernate to assign values to objects　　1) Add the order-by attribute in the 2) because the option of the problem is saved in the database as a string (the option is separated by "\ r \ n"), the string is split before the problem option is displayed on the page. When should the execution time of the string split be better? (Video 16: Survey Management Sy

Database Design refers to the process of designing the database structure according to user requirements. Specifically, database design refers to constructing the optimal database mode under the guidance of the theory of relationa

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

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

enterprises and institutions of the Integrated Management Information system design of the collection of basic tables, it includes all the themes of the unit, this database design, use and maintenance are very complex, the designers, users and DBA requirements are very high. Second, the general method of database