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Concept and advantages of DBMS (Database management system)
Posted Date: 27-May-2012
In this article I will explain the significant features of DBMS in computer technology. What is the basic concept of data base are described in this article. What are the uses and what are the advantages of data base management system are detailed in this article. Article will explain the why DBMS is needed in present technical environment.
Database concepts are-Data- Data refers to the instructions in formalized manner that have meaningful information and can be understand by human. Fields refers to the character's set to represent particular data basics. Deposit of various fields form a record and collection of these records is called file. Information means that data over which decisions and events are based and Data processing means filling of data by different users for different purpose. Some of example is Microsoft Access, FileMaker, Oracle, DB2 etc. Four elements of DBMS are modeling language, data structures, data query and transactions. These are four essential elements of DBMS. Data Base management system-data base refers to the set of interconnected data. Information of one file is connected to the information of other so that user can find related information in useful manner. For example the collection of student name, roll number, class etc. is related information collection and hence it is database. Therefore DBMS is the collection of interrelated data and set of methods to contact that data. You can hide the data so that it is invisible for external user. DBMS execute backup and recovery routinely. DBMS is common purpose software organization that facilitates the process of defining, constructing and manipulating database for different applications.
Defining refers to the records types structures and constraints for the data to be stored in data base. Constructing means storing of data in storage devices controlled by DBMS. Manipulating means updating of data. Updating means edit, change or delete the data.
http://en.wikipedia.org/wiki/File:Relational_key.png link to wiki
Relational model of DBMS
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Advantages of Database Management System
Advantages of DBMS are Avoid duplication-DBMS allows us to reduce the duplicity of data And provides different data for different user at same time without duplication. Sharing of information Allows the sharing of data that means development of new application takes place already stored data. Integrity-Integrity refers to the unification of many files in to single file. This integrity reduces duplication and also eliminate variation. Security and privacy-The Most important advantage of DBMS is to provide security as well as privacy. It can protect data against unauthorized users. Privacy means it is up to the author what kind of information is transmitted to others.
DBMS components-DBMS has four components are Data-means presents the facts to represent an information. Hardware-Includes storage devices such as magnetic tape, floppy disks, hard disks etc. All input and output devices also known as computer peripherals. Software-Software refers to the program that allows hardware to work perfect manner. User-User is that component who enjoy the all benefit of DBMS. User may be of any type such as application programmer, end user, database administrator and system analyst. Application programmer develop any application that is demand of present day. End users are the people who take the benefit of developed applications. Data base administrator is the administrator of developed DBMS. System analyst is important because before developing and implementing he analyze the whole DBMS with great expertised knowledge.
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