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Module: Database guidance System(DBMS) Module Code: DIS201 Semester-III, Year-2011, BE(IT) Programme handler: Tsheten Dorji surgical incision of Information Technology College of Science & Technology, eat into Chapter 1 Introduction and abstract Modeling  fundamental Definitions ? Database: A collection of related selective information. ? Data: Known facts that female genitals be recorded and take over an unverbalized meaning. ? Mini-world: few unwrap of the real world about which information is stored in a informationbase. For example, student grades and transcripts at a university. ? Database Management System (DBMS): A software package package/ system to drive on the creation and aid of a computerized database. ? Database System: The DBMS software together with the data itself. Sometimes, the applications are also included.

Slide 1-3  exemplary DBMS Functionality ? sic a database : in terms of data types, structures and constraints ? Construct or Load the Database on a thirdhand storage strong point ? Manipulating the database : querying, generating reports, insertions, deletions and modifications to its content ? Concurrent process and Sharing by a set of users and programs yet, keeping totally data valid and concordant ? Other features: Protection or Security measures to prevent illegitimate access Active bear on to take internal actions on data Presentation and visualization of data Slide 1-4 Example of a Database(with a Conceptual Data Model) ? Mini-world for the example: Part of a UNIVERSITY environment. ? Some mini-world entities: STUDENTs COURSEs SECTIONs (of COURSEs) (academic) DEPARTMENT! s INSTRUCTORs ? Some mini-world relationships: SECTIONs are of specific COURSEs STUDENTs take SECTIONs COURSEs have prerequisite COURSEs INSTRUCTORs give instruction SECTIONs COURSEs are offered by DEPARTMENTs STUDENTs major in DEPARTMENTs Note: The supra could be expressed in the ENTITY-RELATIONSHIP data model. Slide 1-5  main(prenominal) Characteristics of the Database Approach ?...If you want to get a estimable essay, give it on our website: BestEssayCheap.com

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