Chapter 10 Database Management Systems

Chapter 10 Database Management

Chapter 10 Objectives Discuss the functions common to most DBMSs Identify the qualities of valuable information Explain why data is important to an organization Discuss the terms character, field, record, and file Identify file maintenance techniques Differentiate between a file processing system approach and the database approach Describe characteristics of relational, object-oriented, and multidimensional databases Explain how to interact with Web databases Discuss the responsibilities of database analysts and administrators Define the term, database Next

Data and Information ,[object Object],p. 514 - 515 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) Add, change, and delete data Create database Sort and retrieve data Create forms and reports Next

Data and Information ,[object Object],p. 514 - 515 Fig. 10-1 ,[object Object],[object Object],[object Object],Next

Data and Information ,[object Object],p. 516 ,[object Object],[object Object],Garbage out Garbage in Data integrity is lost Next Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Data Security below Chapter 10

Data and Information ,[object Object],p. 516 - 517 Next

The Hierarchy of Data ,[object Object],p. 517 Fig. 10-2 ,[object Object],Next

The Hierarchy of Data ,[object Object],p. 518 Fig. 10-3 ,[object Object],[object Object],[object Object],[object Object],[object Object],Next

The Hierarchy of Data ,[object Object],p. 518 Yes/No (also called Boolean )—only the values Yes or No (or True or False) Hyperlink Web address that links to document or Web page Object (also called BLOB for binary large object)—photograph, audio, video, or document created in other application such as word processing or spreadsheet Next Currency dollar and cent amounts or numbers containing decimal values Date month, day, year, and sometimes time Memo lengthy text entries Text (also called alphanumeric )—letters, numbers, or special characters Numeric numbers only AutoNumber unique number automatically assigned to each new record

The Hierarchy of Data ,[object Object],p. 519 Group of related fields Key field , or primary key , uniquely identifies each record Next

The Hierarchy of Data ,[object Object],p. 518 ,[object Object],Next

Maintaining Data ,[object Object],p. 520 ,[object Object],Next ,[object Object],[object Object],[object Object]

Maintaining Data ,[object Object],p. 520 Fig. 10-5 ,[object Object],Next

Maintaining Data ,[object Object],p. 521 Fig. 10-6 ,[object Object],[object Object],Next

Maintaining Data ,[object Object],p. 522 Fig. 10-7 ,[object Object],[object Object],Next

Maintaining Data ,[object Object],p. 522 - 523 Fig. 10-8 ,[object Object],[object Object],Next

Maintaining Data ,[object Object],p. 523 ,[object Object],Next ,[object Object],[object Object],[object Object],[object Object]

File Processing Versus Databases ,[object Object],p. 524 Each department or area within organization has own set of files May have weaknesses Records in one file may not relate to records in any other file Isolated data—data stored in separate files so it is difficult to access Next Data redundancy—same fields stored in multiple files

File Processing Versus Databases ,[object Object],p. 524 - 525 Fig. 10-9 ,[object Object],[object Object],Next

File Processing Versus Databases ,[object Object],p. 525 Reduced data redundancy Improved data integrity Shared data Easier access Reduced development time Next

File Processing Versus Databases ,[object Object],p. 525 Fig. 10-10 Next

Database Management Systems ,[object Object],p. 526 Fig. 10-11 Next Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Teradata below Chapter 10

Database Management Systems ,[object Object],p. 527 Fig. 10-12 ,[object Object],Next

Database Management Systems ,[object Object],p. 528 - 529 Fig. 10-13 ,[object Object],[object Object],Next Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Query below Chapter 10

Database Management Systems ,[object Object],p. 528 - 529 Fig. 10-14 ,[object Object],[object Object],Next

Database Management Systems ,[object Object],p. 530 Fig. 10-15 ,[object Object],[object Object],[object Object],Next

Database Management Systems ,[object Object],p. 530 Fig. 10-16 ,[object Object],[object Object],Next

Database Management Systems ,[object Object],p. 530 - 531 Read-only privileges - user can view data, but cannot change it DBMS provides means to ensure only authorized users can access data Access privileges define activities that specific user or group of users can perform Full-update privileges -user can view and change data Next

Database Management Systems ,[object Object],p. 531 Fig. 10-17 ,[object Object],[object Object],[object Object],Next

Database Management Systems Video: How A Photo Sharing Site Keeps its Data Next CLICK TO START

Database Management Systems ,[object Object],p. 531 - 532 ,[object Object],[object Object],[object Object],[object Object],Next Uses logs and/or backups to restore database when it is damaged or destroyed Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Continuous Backup below Chapter 10

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 532 Fig. 10-18 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Next

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 533 Fig. 10-19 ,[object Object],[object Object],[object Object],[object Object],[object Object],Next Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Relational Databases below Chapter 10

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 533 Fig. 10-20 ,[object Object],Next

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 534 Fig. 10-21 ,[object Object],[object Object],Next Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click SQL below Chapter 10

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 534 - 535 Object is item that contains data, as well as actions that read or process data ,[object Object],[object Object],[object Object],Next Advantages Often uses object query language (OQL) Stores data in objects Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Object-Oriented Databases below Chapter 10

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 534 Next Multimedia databases Store images, audio clips, and/or video clips Groupware databases Store documents such as schedules, calendars, manuals, memos, and reports Computer-aided design (CAD) databases Store data about engineering, architectural, and scientific designs Hypertext databases Contain text links to other documents Web databases Link to e-form on Web page

[object Object],Relational, Object-Oriented, and Multidimensional Databases p. 535 Next Stores data in dimensions Multiple dimensions, also called hypercube, allow users to analyze any view of data Can consolidate data much faster than relational database Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Multidimensional Databases below Chapter 10

Relational, Object-Oriented, and Multidimensional Databases ,[object Object],p. 536 Next ,[object Object],[object Object],[object Object],[object Object],[object Object],Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Data Warehouses below Chapter 10

Web Databases ,[object Object],p. 536 - 537 Fig. 10-23 ,[object Object],[object Object],Next

Database Administration ,[object Object],1. Determine the purpose of the database 4. Determine the relationships among the tables or files ,[object Object],[object Object],p. 537 Fig. 10-24 ,[object Object],[object Object],[object Object],[object Object],[object Object],3. Design the records and fields for each table 2. Design the tables Next Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Database Design Guidelines below Chapter 10

Database Administration ,[object Object],p. 538 ,[object Object],[object Object],[object Object],Click to view Web Link, click Chapter 10, Click Web Link from left navigation, then click Database Administrators below Chapter 10 Next Database analyst (DA) Database administrator (DBA)

Summary of Database Management Chapter 10 Complete How data and information are valuable assets to an organization Methods for maintaining high-quality data Assessing the quality of valuable information Advantages of organizing data in a database Various types of databases Role of the database analysts and administrators

Chapter 10 Database Management Systems

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Chapter 10 Database Management Systems