INTRO TO RDBMS-OODBMS-ORDBMS Seema Sirpal Delhi University Computer Centre Databases Data - raw facts/details DATABASE- A shared collection of logically related data (and a description of this data)‚ designed to meet the organization needs of an organization The Database Management System (DBMS) - software that enables users to define‚ create and maintain the database and provides controlled access to the database Why We Need DBMS There is an information explosion in today’s
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Principles of Distributed Database Systems M. Tamer Özsu • Patrick Valduriez Principles of Distributed Database Systems Third Edition M. Tamer Özsu David R. Cheriton School of Computer Science University of Waterloo Waterloo Ontario Canada N2L 3G1 Tamer.Ozsu@uwaterloo.ca Patrick Valduriez INRIA LIRMM 161 rue Ada 34392 Montpellier Cedex France Patrick.Valduriez@inria.fr This book was previously published by: Pearson Education‚ Inc. ISBN 978-1-4419-8833-1 e-ISBN
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need to cover the modeling deficiencies of their predecessors‚ that is the relational database management systems. They were intended to be used by applications that have to handle big and complex data such as Computer Aided Engineering‚ Computer Aided Design‚ and Office Information Systems. <br><br>The area of the OODBMSs is characterized by three things. First‚ it lacks a common data model. There is no common data model although many proposals can be found in the literature. This is a more general
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Course Name: Fundamentals of Programming Course Code: MCA111 Objectives: The aim of this course is to introduce the rudiments of programming to the students. Students will become familiar with problem solving techniques and algorithm development using computers. This will include structured programming using C‚ a high-level programming language. Prerequisites: None Contents: 1.Introduction to programming& Basics of C: Concepts of Algorithm and Flowcharts‚ Process of compilation‚ Generation
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exam paper. 1. Which of the following is NOT a level at which data can be described in the database? A. External B. Schematic C. Conceptual D. Internal E. None of the above 2. Which of the following should always be TRUE for a primary key in a relational model? A. The primary key of a table serves to uniquely identify individual rows of the table. B. The primary key of a table is allowed to be null. C. Non-key columns are not dependent on the primary key. D. A primary key may not consist of more than
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Character The most basic logical data element is the character‚ which consists of a single alphabetic‚ numeric‚ or other symbol. One might argue that the bit or byte is a more elementary data element‚ but we should remember that those terms refer to the physical storage elements provided by the computer hardware. Field The next higher level of data is the field‚ or data item. A field consists of a grouping of related characters. For example‚ the grouping of alphabetic characters in a person’s
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represent the super thin look and it is part of the requirement to be a model‚ however there are many types of modeling agencies in America; every agency includes one or more types of modeling. The goals of models in America leave unhealthy images imprinted in the minds of children in today’s society. It is much more than a job‚ it is a way of life which consists of nothing but working harder each day to reach their goal or goals. Models are being harmed by the emphasis on being thin and it needs to stop
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Characteristics of a Role Model Role models are people who inspire others with their superior qualities and their commitment for a good cause. Here are some main characteristics of a role model. Parents often tell their children about looking up to people who set good examples in their lives. Such people often end up being role models for youngsters or even adults and their habits are often emulated. Positive people can have a positive effect on the lives of others. These role models are often leaders
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ANOREXIC MODELS (AND HOW GIRLS LOOK UP TO THEM) The world of fashion has always been filled with glamour and glitz and perfection. Celebrities and models being surrounded by the paparazzi almost everyday of their lives and being present at the most prestigious functions‚ not to forget being featured on the covers of those oh-so-glossy fashion magazines and billboards all over town. Lifestyles of the rich and famous – something that every pre-teen and teenage girl wants. Flipping through fashion
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Choose the correct or best alternative in the following: Q.1 In the relational modes‚ cardinality is termed as: (A) Number of tuples. (B) Number of attributes. (C) Number of tables. (D) Number of constraints. Ans: A Q.2 Relational calculus is a (A) Procedural language. (C) Data definition language. Ans: B Q.3 The view of total database content is (A) Conceptual view. (C) External view. Ans: A Q.4 Cartesian product in relational algebra is (A) a Unary operator. (B) a Binary operator. (C) a Ternary
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