CS6083: Principles of Database Systems ! Systems Concepts‚ 6th Edition‚ McGraw-Hill 2009. (The 4th and 5th editions are also OK to use.)! Will use slides from book as well as extra material! Posted on course page a day ahead of class! Database System Concepts - 6th Edition! Modified by T. Suel for CS6083‚ NYU Poly‚ Fall 2012! 1.1! ©Silberschatz‚ Korth and Sudarshan! CS6083: Principles of Database Systems ! Prerequisites: Data Structures‚ Operating Systems! Binary search trees
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Case 4: Amazon: One E-Store to Rule Them All 1) The CEO of Amazon.com‚ Jeff Bezos‚ effectively employed both intuitive and systematic thinking when he developed the Kindle for sale. Through Bezos’s creative idea in the Kindle‚ one can see that he makes decisions that seem to be based off of intuitive thinking. With this approach‚ people make decisions according to their past experiences and gut feelings‚ as opposed to analyzing all of the facts. Bezos took a risk in the creation of the Kindle
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successful as a business on internet and has excellent capabilities supported by information system and e-commerce? 5 The market in which amazon.com operates and how it is organized by region and country: 10 References 12 History of Amazon.com: Amazon was founded in 1994‚ spurred by what Bezos called "regret minimization framework"‚ his effort to fend off regret for not staking a claim in the Internet gold rush. Company lore says Bezos wrote the business plan while he and his wife drove from New
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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 a collection of data organized to meet users’ needs. Why This Matters Without data and the ability to process it‚ an organization would not be able to successfully engage in business activities‚ nor would it be able to generate reports to support knowledgeable workers and decision makers which in turn help’s to achieve organizational goals; it would not be able to pay employees‚ send out bills‚ and order new inventory. Databases have made it possible to map the structure
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HISTORY OF DATABASE MANAGEMENT SYSTEM With the progress in technology in the areas of processors‚ computer memory‚ computer storage and computer networks‚ the sizes‚ capabilities‚ and performance of databases and their respective DBMSs have grown in orders of magnitudes. The development of database technology can be divided into three eras based on data model or structure: navigational‚ SQL/relational‚ and post-relational. The two main early navigational data models were the hierarchical model
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DataBase Concepts DataBase – a collection of information related to specific entity (e.g. organization‚ bank‚ college‚ library etc.) DBMS – (Database management system) – a application through which we can control the database i.e. we can store data into database‚ update the data and delete also we can retrieve the data from database. For doing these operation DBMS support a language called Structured Query language (SQL). SQL accomplishes many powerful tasks with a mere seven statements: SELECT
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retailer.[4] The company also produces consumer electronics—notably the Amazon Kindle e-book reader and the Kindle Fire tablet computer—and is a major provider of cloud computing services. Jeff Bezos incorporated the company (as Cadabra) in July 1994‚ and the site went online as amazon.com in 1995.[7] The company was renamed after the Amazon River‚ one of the largest rivers in the world‚[7] which in turn was named after the Amazons‚ the legendary nation of female warriors in Greek mythology. Amazon
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FILE OPERATIONS File can be thought of as “logical” or a “physical” entity. File as a logical entity: a sequence of records. Records are either fixed size or variable size. A file as a physical entity: a sequence of fixed size blocks (on the disk)‚ but not necessarily physically contiguous (the blocks could be dispersed). Blocks in a file are either physically contiguous or not‚ but the following is generally simple to do (for the file system): »Find the first block »Find the last block »Find
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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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