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Module: Database prudence System(DBMS) Module Code: DIS201 Semester-III, Year-2011, BE(IT) Programme enlighten: Tsheten Dorji surgical incision of Information Technology College of Science & Technology, niggle Chapter 1 Introduction and conceptual Modeling  fundamental Definitions ? Database: A collection of related selective information. ? Data: Known facts that distaff genitals be recorded and take over an unspoken meaning. ? Mini-world: whatever unwrap of the real world about which entropy is stored in a database. For example, student grades and transcripts at a university. ? Database Management System (DBMS): A software package/ system to urge 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  characteristic DBMS Functionality ? sic a database : in terms of data types, structures and constraints ? Construct or Load the D atabase on a vicarious storage strong point ? Manipulating the database : querying, generating reports, insertions, deletions and modifications to its content ? Concurrent impact and Sharing by a set of users and programs yet, keeping all data valid and concordant ? Other features: Protection or Security measures to prevent illegitimate access Active touch to take internal actions on data Presentation and visual image 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) DEPARTMENTs INSTRUCTORs ? Some mini-world relationships: SECTIONs are of specific COURSEs STUDENTs take SECTIONs COURSEs have prerequisite COURSEs INSTRUCTORs initiate 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 th! e Database Approach ?...If you want to get a estimable essay, browse it on our website: OrderEssay.net

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