Chapter01 - Copyright 2007 Ramez Elmasri and Shamkant B....

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Slide 1- 1 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe
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Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Chapter 1 Introduction: Databases and Database Users
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Slide 1- 3 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Outline Types of Databases and Database Applications Basic Definitions Typical DBMS Functionality Example of a Database (UNIVERSITY) Main Characteristics of the Database Approach Database Users Advantages of Using the Database Approach When Not to Use Databases
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Slide 1- 4 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Types of Databases and Database Applications Traditional Applications: Numeric and Textual Databases More Recent Applications: Multimedia Databases Geographic Information Systems (GIS) Data Warehouses Real-time and Active Databases Many other applications First part of book focuses on traditional applications A number of recent applications are described later in the book (for example, Chapters 24,26,28,29,30)
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Slide 1- 5 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Basic Definitions Database: A collection of related data. Data: Known facts that can be recorded and have an implicit meaning. 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 the creation and maintenance of a computerized database. Database System: The DBMS software together with the data itself. Sometimes, the applications are also included.
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Slide 1- 6 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Simplified database system environment
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Slide 1- 7 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Typical DBMS Functionality Define a particular database in terms of its data types, structures, and constraints Construct or Load the initial database contents on a secondary storage medium Manipulating the database: Retrieval: Querying, generating reports Modification: Insertions, deletions and updates to its content Accessing the database through Web applications Processing and Sharing by a set of concurrent users and application programs – yet, keeping all data valid and consistent
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Slide 1- 8 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Typical DBMS Functionality Other features: Protection or Security measures to prevent unauthorized access “Active” processing to take internal actions on data Presentation and Visualization of data Maintaining the database and associated programs over the lifetime of the database application Called database, software, and system maintenance
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Slide 1- 9 Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Example of a Database (with a Conceptual Data Model) Mini-world for the example: Part of a UNIVERSITY environment.
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This note was uploaded on 12/18/2009 for the course CS 348 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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Chapter01 - Copyright 2007 Ramez Elmasri and Shamkant B....

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