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Module: Database forethought System(DBMS) Module Code: DIS201 Semester-III, Year-2011, BE(IT) Programme give lessons: Tsheten Dorji surgical incision of Information Technology College of Science & Technology, irritate Chapter 1 Introduction and abstract Modeling  fundamental Definitions ? Database: A collection of related selective information. ? Data: Known facts that feminine genitals be recorded and take over an understood meaning. ? Mini-world: some(prenominal) unwrap of the real world about which information is stored in a database. For example, student grades and transcripts at a university. ? Database Management System (DBMS): A software system package/ system to drive 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  representative DBMS Functionality ? sic a database : in terms of data types, structures and constraints ? Construct or Load the Database on a tributary 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 whole data valid and concordant ? Other features: Protection or Security measures to prevent illegitimate access Active treat to take internal actions on data Presentation and visual percept 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) DEPAR TMENTs INSTRUCTORs ? Some mini-world rela! tionships: SECTIONs are of specific COURSEs STUDENTs take SECTIONs COURSEs have prerequisite COURSEs INSTRUCTORs memorise SECTIONs COURSEs are offered by DEPARTMENTs STUDENTs major in DEPARTMENTs Note: The to a higher place 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, gild it on our website: OrderEssay.net

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