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3. Technology Briefing. Database Management. “Modern organizations are said to be drowning in data but starving for information” p. 509. Learning Objectives. Learning Objectives. Group Discussion Compare (present, past) of the following organizations:. Super markets Libraries Hospitals - PowerPoint PPT Presentation
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Information Systems Today: Managing in the Digital World TB3-1
3Technology Briefing
Database Management
“Modern organizations are said to be drowning in data but starving for information”
p. 509
Information Systems Today: Managing in the Digital World TB3-2
Learning Objectives
Information Systems Today: Managing in the Digital World TB3-3
Learning Objectives
Group Discussion
Compare (present, past) of the following organizations:
• Super markets
• Libraries
• Hospitals
• Governmental officesInformation Systems Today: Managing in the Digital World TB3-4
Information Systems Today: Managing in the Digital World TB3-5
Learning Objectives
Information Systems Today: Managing in the Digital World TB3-6
Database Foundations
• Then:o Card catalogs
o File cabinets
• Now:o DBMS
• Create• Store• Organize• Retrieve data
o E.g., Microsoft Access
Information Systems Today: Managing in the Digital World TB3-7
Database
• Databaseo Collection of related
data organized in a way to facilitate searches
o Entities
• Something you collect data about
• E.g.: people, books
Information Systems Today: Managing in the Digital World TB3-8
Record
• Contains data about a single entityo Similar to catalog
card
Information Systems Today: Managing in the Digital World TB3-9
Attributes
• Specific characteristic describing the entitieso E.g.: name and social
security number are attributes of a person
Information Systems Today: Managing in the Digital World TB3-10
Example: Entity Student• Entity represented as a table, with rows as records and
columns as attributes
Information Systems Today: Managing in the Digital World TB3-11
Advantages of the Database Approach
1. Program-data independence
2. Minimal data redundancy
3. Improved data consistency
4. Improved data sharing
5. Enforcement of standards
6. Reduced program maintenance
Group Activity
• Visiting “King Abdu-Allah Library”
Information Systems Today: Managing in the Digital World TB3-12
Information Systems Today: Managing in the Digital World TB3-13
Entering Data
• Formso Give some examples of forms..
Entering DataForms
o Enter data about a record
o Field in a form corresponds to attribute in a record
o Used to add, modify, or delete data
Information Systems Today: Managing in the Digital World TB3-14
Information Systems Today: Managing in the Digital World TB3-15
Example: Computer-Based Form
Information Systems Today: Managing in the Digital World TB3-16
Querying Data• Query: used to retrieve information
• Structured Query Language (SQL) o Example: Display students who earned an “A”
o Writing SQL queries can become very complex
TB3-17
Creating Database Reports• Report
o Compilation of data from the database
• Exampleo Quarterly sales for a
restaurant
• Adding
• Grouping
Information Systems Today: Managing in the Digital World TB3-18
Identifying Records
• Uniquely identifying records:
o Primary Key• Unique identifier • E.g.: Student ID number, social security number
Information Systems Today: Managing in the Digital World TB3-19
Linking Website Applications to Organizational Databases
• Users can access a variety of data via a company’s web siteo Web services help in integration of
databases, regardless of physical location
• Need for adequate systems performance
• Get understanding of customer behavior
Information Systems Today: Managing in the Digital World TB3-20
Effective Management of Databases• Database Administrator (DBA)
o Responsible for development and management of databases
•Works with system analysts and programmers
•Works with users and managers
• Implements security features
•Grants access rights
o One of the key actors in creating a successful database