Library design skills 14-NET Abstract (from: http://blog.csdn.net/wentasy/article/details/7538169
)
The following 14 database design skills are gradually summarized by many people in a large number of database analysis and design practices. The use of these
The following 14 database design skills are gradually summarized by many people in a large number of database analysis and design practices. The use of these database design experience is flexible and gradually achieved: Developme
Theories and Methods of Database Design
1 Database Design Overview
Database is the latest technology in data management, with Data structuring, minimum redundancy, and high
Program Data independence, scalability, and ease of compiling applications. So-called
Label:First, the necessity of database design In the actual software project, if the system needs to store a large amount of data, the table needs to be designed more, the relationship between table and table is more complex, then we need to standardize the database settings. Without the design of the
define the primary key, You can also not define a primary key (because it has no descendants), but you 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 design of the global
Currently want to do a mobile version of the mall, in the design of the database encountered the problem:
such as a dress, this dress has red, white, blue,Red and x,xl,xll size,White with S,M,X,XLBlue with M,X,XL
For their own design of the database has been not very satisfied, look at the way the great God, enlighten
I. Database Design Process
Database technology is the most effective means of information resource management. Database Design refers to constructing the optimal database mode for a given application environment, establishing a
I. Database Design Process
Database technology is the most effective means of information resource management. Database Design refers to constructing the optimal database mode for a given application environment, establishing a
I. Database Design Process
Database technology is the most effective means of information resource management. Database Design refers to constructing the optimal database mode for a given application environment, establishing a
I. Database Design Process
Database technology is the most effective means of information resource management. Database Design refers to constructing the optimal database mode for a given application environment, establishing a
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 d
The Oracle tutorial being looked at is the design and development of Oracle Platform application database system. Oracle is currently the most widely used database system. A complete database system includes system hardware, operating system, Network layer, DBMS (database ma
the leaf area can define a primary key or not define 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 design of the global
), 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 database
), 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 database
Abstract This article mainly analyzes the ORACLE system structure and working mechanism from four different levels of Adjustment Analysis in the ORACLE environment of a large database, the optimization and adjustment schemes for ORACLE databases are summarized in nine different aspects.Key words: ORACLE database environment Adjustment Optimization Design SchemeTh
no primary key and no foreign key. In the E-r diagram, the entity in the leaf area can define the primary key,You can also not define a primary key (because it has no descendants), but you 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
Database Design Principles
1. The relationship between the original document and the object can be one-to-one, one-to-many, and many-to-many. In general, they are a one-to-one relationship: an original document corresponds to only one entity.
In special circumstances, they may be one-to-many or many-to-one relationships, that is, an original document corresponds to multiple entities, or multiple original do
Tags: database paradigmThe design paradigm (paradigm, Database design paradigm, database design paradigm) is a collection of relational patterns that conform to a certain level. The construction
Standardization | design | data | database | Database design relational database design is the process of organizing and structuring data. The core problem is the design of the relatio
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.