Download Chapter 1: Why Study Computers and Digital Technology?

Databases
Basic Data Management Concepts
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 Database
 Collection of all the data related to a particular topic or
purpose -- for example, student data, customer data or
product data
 Database management system (DBMS)

Software used to access database
When do I interact with databases
 Register for classes
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 Shopping
 Finding midi files on the CIS 1055 website
 Flight registration systems
 Cherry & White Pages
 Purchasing a book from Amazon.com
 Paying your phone bill on line
Data Organization
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Records
Garner Julia
Garrett Allen
Gieger Carl
Geiser Gary
Goucher Gerard
30 Simpson Ave
1222 Elm Street
25 West Ave
712 Chestnut
17 Asbury Ave
555-3432
555-9876
555-2702
555-1112
555-2956
Fields
A collection of one or more related tables
Database
File or Table
The Organization/Hierarchy of Data
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 Field
 Name, number, or combination of characters that describes
some aspect of an object
 Record
 Collection of related fields
 File
 Collection of related records
 Database
 Collection of integrated and related files
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What can I do with a DBMS
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 Enter data quickly and easily
 Organize records in different ways
 Locate specific records quickly
 Eliminate data
 Connect files with related information
 Create Reports
 Create Queries
The Database Approach to Data Management
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 Database approach
 Multiple
application programs share a pool of
related data
 Increased flexibility in the use of data
 Requires a database management system
(DBMS)
Queries
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 Built thru SQL (Structured Query Language)
 First Name, Last Name and Annual Fee
Milton
Louella
Elena
Adelbert
Benjamin
Brewer
Drake
Gupta
Ruiz
Tu
$90.00
$40.00
$55.00
$80.00
$37.0
 SQL:
SELECT FIRSTNAME, LASTNAME, ANNUAL FEE
FROM: MEMBER, MEMBERSHIP PLANS
WHERE MEMBER.MEMBERSHIP CODE =
MEMBERSHIP PLANS.MEMBERSHIP CODE
ORDER BY LAST NAME
Relational Database
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Sales No
Territory
Sales No
LName
FName
112
1
112
Belle
Jamie
113
2
115
Morris
Dave
114
3
114
Allan
Wil
115
4
113
Shaw
Danny
116
5
116
Michaels
Wilson
117
6
117
Crozier
Judy
Sales No
LName
FName
Territory
112
Belle
Jamie
1
113
Shaw
Danny
2
114
Allen
Will
3
Database Structures
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 Types of Databases
 Relational
 Object-Oriented
 Hierarchical, Network, Multi-Dimension