CHAPTER 17 DATA MODELING AND DATABASE DESIGN SUGGESTED ANSWERS TO DISCUSSION QUESTIONS 17.1 Why is it not necessary to model activities such as entering information about customers or suppliers‚ mailing invoices to customers‚ and recording invoices received from suppliers as events in an REA diagram? The REA data model is used to develop databases that can meet both transaction
Premium Balance sheet Entity-relationship model Sales order
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 operator. (D) not defined
Premium SQL Data modeling Relational model
Lecture Notes 1 Data Modeling ADBMS Lecture Notes 1: Prepared by Engr. Cherryl D. Cordova‚ MSIT 1 • Database: A collection of related data. • Data: Known facts that can be recorded and have an implicit meaning. – An integrated collection of more-or-less permanent data. • Mini-world: Some part of the real world about which data is stored in a database. For example‚ student grades and transcripts at a university. • Database Management System (DBMS): A software package/ system to facilitate
Premium Database Data modeling Relational model
research has been conducted regarding the nature of the two groups‚ which has aided this critical analysis of the notion that employees are more important than customers as well as the counter-argument that employees are indeed more important. Employees are more important than customers The importance of employees extends far beyond the mere ability to meet the needs of a customer. As such‚ the view that employees are more important than customers is highly viable and supported. This importance can
Premium Management Marketing German language
UNCLASSIFIED UNCLASSIFIED 1 Open Data Strategy June 2012 UNCLASSIFIED UNCLASSIFIED 2 Contents Summary ................................................................................................... 3 Introduction ................................................................................................ 5 Information Principles for the UK Public Sector ......................................... 6 Big Data .......................................................................
Premium Tax
Sports: More Than Just a Game More than 7.6 million high school students played sports during the 2010-2011 school year‚ an increase of nearly 40‚000 students compared to 2009-2010 according to usnews.com. Why is this number so high? The benefits of playing sports are not just physical. While many students get involved in high school athletics for sheer love of the game‚ there are significant benefits from these extracurricular activities as well. Being an athlete teaches life lessons like
Premium High school Obesity
Developmentally Appropriate Practices and the Whole Child Abstract: Developmentally Appropriate Practices provides a guideline to teachers for structuring classroom activities. The activities which work on the development of the whole child contributes to his/her optimum development as the focus is on child’s age‚ interests‚ developmental level and prior experiences. Developmentally Appropriate Practices works on identifying and bridging of gaps in learning and thus ensuring development of the
Premium Education Educational psychology Learning
Q) What are Secondary Data? Secondary Data Secondary data is information gathered for purposes other than the completion of a research project. Data previously collected by someone else‚ possibly for some other purpose that can be used later for making decisions if found suitable for the purpose‚ other than the original one. Secondary data can be acquired from the internal records of the organization‚ their departments‚ subsidiaries or sister organizations and also from external sources‚ such
Premium Marketing Database
Be Data Literate – Know What to Know by Peter F. Drucker Executives have become computer literate. The younger ones‚ especially‚ know more about the way the computer works than they know about the mechanics of the automobile or the telephone. But not many executives are information-literate. They know how to get data. But most still have to learn how to use data. Few executives yet know how to ask: What information do I need to do my job? When do I need it? In what form
Premium Decision making Information systems Chief information officer
DATA COMPRESSION The word data is in general used to mean the information in digital form on which computer programs operate‚ and compression means a process of removing redundancy in the data. By ’compressing data’‚ we actually mean deriving techniques or‚ more specifically‚ designing efficient algorithms to: * represent data in a less redundant fashion * remove the redundancy in data * Implement compression algorithms‚ including both compression and decompression. Data Compression
Premium Data compression