Module-1.pdf - Introduction to Relational Database Design and SQL Programming Basics 2013,2014 Niket K Patwardhan Resources Recommended Text Sams Teach

Module-1.pdf - Introduction to Relational Database Design...

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Introduction to Relational Database Design and SQL Programming Basics © 2013,2014 Niket K. Patwardhan 9/18/2015
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Resources Recommended Text Sams Teach Yourself SQL in 24 Hours (5th Edition) by Ryan Stephens, Ron Plew and Arie D. Jones (May 23, 2011) Codd paper A relational model of data for large shared data banks Edgar F. Codd Communications of the ACM 13(6) 377 ORACLE 11G UCSC system Class introduction Homework: - Get a copy of the Codd paper © 2013,2014 Niket K. Patwardhan 9/18/2015
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ORACLE 11G Download & Setup Homework: Download and setup ORACLE 11G © 2013,2014 Niket K. Patwardhan 9/18/2015
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9/18/2015 © 2013,2014 Niket K. Patwardhan
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History of Databases Database := Store of lots of data with methods to c reate, r etrieve, u pdate and d elete data. (CRUD) The greatest invention symbols/language Giving objects and actions a name, writing Libraries - ~2600 BC Alphabets, classification systems Encyclopedias - ~AD 77 Book making, codex format, printing Microfiche - ~1870 Photography, Carrier Pigeons, Vannevar Bush, memex, hyperlinks Punched (Hollerith) Cards 1890 Jacquard looms, Census, IBM Electronic - 1951 Computers, Tape, Drum, Disk © 2013,2014 Niket K. Patwardhan 9/18/2015
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Physical Database Concepts Paper Databases Record and file, file number, record number, “confirmation number” Punch cards Fixed size records, fields Automate sorting, counting, finding Tape archives Synchronization marks Fast forward and rewind Volumes Sequential access Magnetic disk Random access by cylinder, head, sector Keys, hashes B-trees Multiple indexes ISAM (sequential and indexed access) © 2013,2014 Niket K. Patwardhan 9/18/2015
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Accessing a Physical DB Must understand physical characteristics of medium Typically specify position of data within medium Changing medium requires changing access program © 2013,2014 Niket K. Patwardhan 9/18/2015
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Logical Databases Knowledge of physical characteristics of media is not required to access the data. Computers/electronics transform logical parameters into physical parameters before accessing data. Access to fields possible by name instead of position. Access to records possible by matching content instead of specifying address (CAM) Access to DB reflects structure of business rather than structure of media.
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