database definition computer

to group and sort in a query (5) Improve system performance with an optimized stealth device Increase the disadvantage of the index (1) Creating and maintaining indexes is time consuming (2) Index to occupy physical space (3) Indexes should be maintained dynamically when the data in the table is added, deleted, and modified As a general rule: You should create an index on the following columns: (1) On columns that are often searched (2) on the column as the primary key (3) On columns that a

Label:Objective A period of time to participate in self-examination, to test the principles of the database, in which also more understanding of a lot of database problems. For example, how to create a good database, how to create a database. 图一 数据库创建框架 Now

Data | database Integrated examination system of computer culture base based on database, OLE and VBA technology Chen Cli Content Summary: This paper introduces the integration examination system developed by using database technology, Object linking technology (OLE) and VBA programming in VB, so as to realize the pa

What are the computer two-level Access database videos? Now candidates for the computer two Access database more and more, many may be just contact with the computer two-level Access database of the major, today's lesson small com

Label:Defined: DBMS monitoring of the DB, known as database management, or database protection. ****************************************** The minimum logical working unit for DBS runs is: transactions. Transaction definition: is the set of operations that make up a single logical unit of work, either fully executed or not executed at all. For example: Bank De

. Shanghai Jiao Tong University: Shanghai Jiao Tong University in recent years, the development of software direction, pattern recognition and intelligent control is also a key national discipline. The advantage areas include system software, network information acquisition and processing, parallel and distribution theory, database and so on. Nanjing University: If the the 1980s software professional is Hantilin, then now the Nan can be said to be a s

Tags: span improved ack repetitive design theory knowledge physical GPO Personal The general process of designing a database must be known to everyone. Do not know can be very easy to find relevant information on the Internet, usually, we will be divided into 6 stages of database design. Requirements analysis stage, conceptual structure design phase, logical structure design phase, physical structure design

The design of the database of the general process presumably everyone knows, do not know can easily find relevant information on the Internet, usually, we will be divided into 6 stages of database design, namely, the requirements analysis phase, conceptual structure design phase, logical structure design phase, physical structure design phase, implementation stage, operation and maintenance phase.This time

Objective:Recently started the computer room cooperation, in which they are mainly involved in the design of the D layer, but also in the document design phase mainly involved in database design. Prior to the computer room reconfiguration for the database design did not follow the document to drive, so this time in wri

Sina technology news Beijing Time on the evening of September 14 News, according to foreign media reports, Oracle has been jointly developed with Sun a computer, and plans to be launched with the Exadata brand. Oracle CEO Larry? LarryEllison will release the database computer on Tuesday. This is since Oracle announced in May that it will acquire Sun for $7 billio

relationships given by this process are transformed into a new set of relationships with stronger structures. The normalization process defines a set of hierarchical paradigms: 1NF 2NF 3NF BCNF 4NF pjnf 5NF The discussion of these paradigms (except 1NF) involves the discussion of function dependencies. First Normal (1NF): attributes are no longer divided Second paradigm (2NF): In each relationship, we need to have a keyword (called the primary key) or compound keyword, all other attributes depe

Here we use three text tutorial to demonstrate, MSSQL database backup operation, restore recovery operation, and the following MSSQL database download to the local computer operation, the purpose is to in a tutorial, to facilitate the complete display of these features for you, but also convenient for you to read. Here is the last demonstration of the system, how

gb8567--88Database Design Manual1 IntroductionHigh-quality database in the process of processing big data in the program or system is very important, so there are many requirements and provisions for database design. First of all, the database should have a good maintainability, flexibility, and the database of the alg

Recently, I am working on a small project. I need to allow my colleagues to access the database under my computer, so I have to set up remote access to my database. It took a long time to complete the process, share your experience here. My environment is 64 Recently, I am working on a small project. I need to allow my colleagues to access the

before the first time the computer room charges, using the database is someone else's, cognition can only be built on the basis of others, such as the "database system principle" after learning the book, then go to the previous database, found that the database really need f

Remember, the first time to write a computer room fee system Document template, a full 12 documents need to write, just spent two or three days to let the master acceptance, the completion of the project, so swallowed the document was written. You should know: the account owed, after all, is to pay. Now to the computer room toll system personal version of the reconstruction phase,(1) abstract the data and d

8 MySQL Database Design Optimization Methods for computer second-level examination MySQL The following describes eight Optimization Methods for MySQL Database Design: 1. select the most suitable field attribute MySQL can support access to large data volumes, but generally, the smaller the table in the database, the fas

Tags: database refactoringAfter the completion of the computer room charge system database requirements analysis, ER diagram, relational model of the phase, it is based on the relational model to design the database, the following is my summary of this stage. This relationship model has users, students, cards, basic da

://www.informatik.uni-trier.de /~ Ley/db/conf/www/index.html PODS Acm sigmod Conference on Principles of DB Systems ACM Http://www.informatik.uni-trier.de /~ Ley/db/conf/icde/ EDBT International Conference on Extending DB Technology Springer LNCS Http://www.edbt.org/ SIGIR International Conference on Research and Development in Information Retrieval ACM Http://www.acm.org/sigir/ ICDT International Conference on

When installing the Oracle database's PL/SQL tool, the computer name is the name of the user name that is automatically generated after reloading the system, as a programmer, there is a strong obsessive-compulsive disorder, you want to use their English name as the name of their computer, so the name of the computer changed; Results pl/ The SQL