Information Systems Today: Managing in the Digital World TB3-1 3 Technology Briefing Database Management “Modern organizations are said to be drowning in data but starving for information” p. 509
Dec 30, 2015
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
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Learning Objectives
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Database Foundations
• Then:o Card catalogs
o File cabinets
• Now:o DBMS
• Create• Store• Organize• Retrieve data
o E.g., Microsoft Access
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Database
• Databaseo Collection of related
data organized in a way to facilitate searches
o Entities
• Something you collect data about
• E.g.: people, books
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Record
• Contains data about a single entityo Similar to catalog
card
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Attributes
• Specific characteristic describing the entitieso E.g.: name and social
security number are attributes of a person
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Example: Entity Student• Entity represented as a table, with rows as records and
columns as attributes
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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”
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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
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Example: Computer-Based Form
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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
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Identifying Records
• Uniquely identifying records:
o Primary Key• Unique identifier • E.g.: Student ID number, social security number
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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
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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