DBMS - Chapter10 Database Management Chapter10Objectives...

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Chapter 10  Database  Management
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Chapter 10 Objectives Discuss the functions common to most DBMSs Discuss the functions common to most DBMSs Identify the qualities of valuable information Identify the qualities of valuable information Explain why data is important to an organization Explain why data is important to an organization Discuss the terms character, field, record, and file Discuss the terms character, field, record, and file Identify file maintenance techniques Identify file maintenance techniques Differentiate between a file processing system approach and the database approach Differentiate between a file processing system approach and the database approach Describe characteristics of relational, object-oriented, and multidimensional databases Describe characteristics of relational, object-oriented, and multidimensional databases Explain how Web databases work Explain how Web databases work Discuss the responsibilities of database analysts and administrators Discuss the responsibilities of database analysts and administrators Next
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Data and Information How are data and information related? p. 516 Fig. 10-1 Next processing data stored on disk Step 1. The member data, including a photograph, is entered and stored on the hard disk. Step 2. The computer extracts the member data from disk. Step 3. The receipt is created and printed. Data is raw facts Information is data that is organized and meaningful receipt Computers process data into information
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Add, change, and delete data Create database Create database Sort and retrieve data Create forms and reports Data and Information What is a database ? p. 517 Next Database software allows you to Database software allows you to Collection of data organized so you can access, retrieve, and use it Database software also called database management system (DBMS) Click to view animation
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Data and Information What is data integrity? p. 517 Next Degree to which data is correct Garbage in, garbage out (GIGO) —computer phrase that means you cannot create correct information from incorrect data Garbage out Garbage in Data integrity is lost
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Useful Useful Accessible Accessible Organized Organized Data and Information What are the qualities of valuable information? p. 518 Next Timely Timely Verifiable Verifiable Accurate Cost-effective
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The Hierarchy of Data What is a hierarchy? p. 519 Fig. 10-2 Next Database contains files, file contains records, record contains fields, field contains characters
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The Hierarchy of Data What is a field ? p. 519 Fig. 10-3 Next Combination of one or more characters Smallest unit of data user accesses Field size defines the maximum number of characters a field can contain Field name uniquely identifies each field Data type specifies kind of data field contains
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Yes/No Yes/No (also called Boolean )— only the values Yes or No (or True or False) Hyperlink Hyperlink Web address that links to document or Web page Object (also called BLOB for binary large object)—photograph, audio, video,
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This note was uploaded on 10/22/2011 for the course ECONOMICS 105 taught by Professor Ak during the Spring '11 term at Punjab Engineering College.

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DBMS - Chapter10 Database Management Chapter10Objectives...

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