1 Chapter 1 Database Systems Database Systems: Design‚ Implementation‚ and Management‚ Seventh Edition‚ Rob and Coronel 1 1 In this chapter‚ you will learn: • The difference between data and information • What a database is‚ what the different types of databases are‚ and why they are valuable assets for decision making • The importance of database design • How modern databases evolved from file systems Database Systems: Design‚ Implementation‚ & Management‚ 7th Edition‚ Rob
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DATABASE: A database is an organized collection of data. The data is typically organized to model relevant aspects of reality (for example‚ the availability of rooms in hotels)‚ in a way that supports processes requiring this information (for example‚ finding a hotel with vacancies). A general-purpose database management system (DBMS) is a software system designed to allow the definition‚ creation‚ querying‚ update‚ and administration of databases. Well-known DBMSs include MySQL‚ PostgreSQL‚ SQLite
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PC TO PC FIBER OPTIC COMMUNICATION [pic] Submitted By: lex INTRODUCTION DEFINITION The project PC to PC fiber optic communication deals with data transfer from one computer to another. It uses C programming and the serial ports of the PCs. The ports are programmed in C. We use MAX 232 to convert RS 232 logic to TTL logic and then an optical transmitter circuit to transmit data via fiber optic cable. The optical transmitter circuit has a LED which is matched as far the cable
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Question 1 5 of 5 points An alternative to combining tables by a subquery is to use a join. Selected Answer: True Question 2 5 of 5 points Regarding the interchangeability of subqueries and joins‚ Selected Answer: a join can sometimes be used as an alternative to a subquery‚ and a subquery can sometimes be used as an alternative to a join. Question 3 5 of 5 points When making an SQL query‚ we are using SQL as a(n) ________. Selected
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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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It is known as Mac PCs. Based on the article‚ it is written that no doubt the sales of iPod music players together with iTunes music downloads and sales of the iPhones had generated a lot of profit for the company‚ but the Mac PCs still managed to regain their title as the company’s highest revenue source in June 2007 even though Mac PCs had to struggle their way to break through the worldwide market. The Apple’s Mac sales have indeed increased at triple the rate of other PC industry which made
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Abstract: This paper presents POCKET PC: A Remote PC access through voice using smart phone for physically disable peoples and also for normal peoples.These peoples were not able to work with computer system feasibly.The reason behind implementation of this system is to provide way that the physically disabled people and also normal peoples can easily work with the computer system by using voice command and manual commands.This system requires smart phone‚PC server and speech recognition module(SAPI)
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This type of surveillance delivers social welfare because mothers are happy being able to receive all the support they can to do what is best for their babies (DD208‚ 2013‚ Chapter 2 - Part 1). Helping children at risk of future antisocial behaviour as early as possible shows how this type of surveillance is an investment to society in helping to prevent the likeliness of crimes‚ delivering crime
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Comparing and Contrasting PCs and mainframes Edward Ho POS/355 November‚ 2011 University of Phoenix Comparing and Contrasting PCs and mainframes Summary Before the existence of personal computer or PC‚ there is minicomputer or microcomputer‚ the term “computer” simply referred to mainframes. Mainframes and personal computers have changed drastically over the years but their core functions and systems have stayed the same. The mainframe is used to connect multiple users for
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EE4791 Database Systems 2012-13 Project (CA‚ 20%) Design and Implementation of the Database with Microsoft Access. Group assignment (1-3 persons per group): 1. Propose a database Case Study with at least 5 tables. Write down the requirements on the database. 2. Draw EER diagram. 3. Give relational model (i.e.‚ logical scheme). Normalize up to 3NF. 4. Create the tables in MS Access in Design View. Choose indexes for your query. Implement data integrity (default value‚ range values‚ etc) 5. Implement
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