13 INTRODUCTION TO QUERY OPTIMIZATION This very remarkable man Commends a most practical plan: You can do what you want If you don’t think you can’t‚ So don’t think you can’t if you can. —Charles Inge Consider a simple selection query asking for all reservations made by sailor Joe. As we saw in the previous chapter‚ there are many ways to evaluate even this simple query‚ each of which is superior in certain situations‚ and the DBMS must consider these alternatives and choose the one with
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Designing Databases: Building a Conceptual Data Model [1] Fundamentals of Databases Alvaro A A Fernandes School of Computer Science University of Manchester Acknowledgements 2 These slides are minor adaptaAons of material authored and made available to instructors by Ramez Elmasri
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INDUSTRIAL PROJECT IV EPJO40 Fleet management system CAPE PENINSULA UNIVERSITY OF TECHNOLOGY [BELLVILLE CAMPUS] Surname : Rasmeni Name : Andile Student Number : 205072615 Due Date : 08 May 2007 before 12:00 Supervisor : Mr. Marco Adonis Co-Supervisor : Mr. J. Witkowsky Table of contents 1 Introduction 2 2 Conceptual description 3 3 Explanation of the scope of the project 4 3.1 Aim of the project 4 3.1.1 Tracking 5 3
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MERTON TRUCK COMPANY Sol 1 : Given : Selling Price od Model 101 truck : 39000 Selling Price of Model 102 truck : 38000 We know‚ Contribution C = SP – VC VC for Model 101 : Direct Material + Direct Labor + Variable Overhead : 24000 + 4000 + 8000 = $36000 VC for Model 102: Direct Material + Direct Labor + Variable Overhead : 20000+ 4500+8500 = $33000 Let no of Model 101 produced be X Let no of Model 102 produced be Y Z= (39000-36000)X + (38000=33000)Y Z=3000X + 5000Y
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Concurrency Control in Distributed Database Systems PHILIP A. BERNSTEIN AND NATHAN GOODMAN Computer Corporation of America‚ Cambridge‚ Massachusetts 02139 In this paper we survey‚ consolidate‚ and present the state of the art in distributed database concurrency control. The heart of our analysts is a decomposition of the concurrency control problem into two major subproblems: read-write and write-write synchronization. We describe a series of synchromzation techniques for solving each subproblem
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1. What are the sales objectives for the new sales representatives? The sales objectives of the new sales representative of United Fleet Service would be to attract new contacts through effective customer service and maintaining customer relationship with present and new customers. The new sales representative will improve sales coverage of current customers with excellence communication skills. It is important that customers will to have a personal relationship with the sales representative. The
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Industry Paper Food Truck vs. Organic Trucks The street food trend has been a growing industry nationwide. According to American City Business Journal of Orlando‚ Fl.‚ “more than 3‚000 street vendors made $1.3 billion in revenue in 2010‚ a 12.7% jump from the revenue from the prior year. The average startup cost of a food truck is only about $5‚000-50‚000 and the yearly profit potential can be anywhere from $100-250‚000 per year.” The list of costs for startup include fuel‚ maintenance‚ business permits
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Singapore Institute of Materials Management Diploma in Supply Chain Management Case Study: Double D Trucking Name : Jesmin Chen Shujun Batch : DSCM12/28 Subject : Distribution Management Lecturer : Mr Mystafa Sutan Date : 03 July 2011 Q1: Assess the conclusion reached by Douglas Dean regarding the nature of today ’s trucking industry and shipper demand characteristics. A1: The conclusion reached by Douglas Dean is “to become a full-service
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communication involved with the Burgess Trucking case study. The initial problem starts when Johns received memos sent by the maintenance supervisor regarding extra space needed. *Communication problems: If Johns had read the memos when he received them (a year ago)‚ the company would not have been on such a time restriction and would have had more time to plan out the project more efficiently and economically. Johns disregarded the previous memos that the maintenance supervisor had sent due to trivial
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EPGP-05-130 Merton Truck Company Top Management of Merton Truck Company is planning to revisit the current product mix of the company involving two models of trucks M101 and M102 as the President of the company feels that M101 truck is not contributing to company’s profit. She also feels that purchasing engines from an outside supplier may be a good option as it eases the capacity problem in the engine assembly department. Manufacturing of the trucks are carried out in a three stage
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