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TAMIL NADU OPEN UNIVERSITY MCA - III (SEM 5) JUN 2009 : Relational Database Management Systems

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Ws 6 MCA 431 MCA 21 M.C.A. DEGREE EXAMINATION JUNE 2009. Fifth Semester / Third Year RELATIONAL DATABASE MANAGEMENT SYSTEMS Time : 3 hours PART A (5 Maximum marks : 75 5 = 25 marks) Answer any FIVE questions. 1. With a neat sketch discuss the three-schema architecture of a DBMS. 2. Explain the distinctions among the terms primary key, candidate key and super key. Give a relevant example. 3. Discuss the use of the following in Data Definition Language : (a) ON DELETE CASCADE (b) ON DELETE SET NULL

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Additional Info : Mca - III (sem 5) June 2009 Question Paper - Relational Database Management Systems
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