Database management systems cs403 power point slides lecture 02

2. In the name
of
Allah

3. Database
Management
Systems
Lecture -2

4. An overview of
lecture - 1
• Database definitions
• Database history
• File processing systems
– Shortcomings
• Advantages of database approach

5. What we are
going to study
next?

6. • More advantages of database
approach
• Disadvantages
• Data, its levels
• Database users
• Some common terms
Lecture Overview

7. Other Advantages
Data consistency
Better data security
Improved data standards

8. Balancing of conflicting
requirements
Faster development of new
applications
Better data accessibility
They also provide

9. • Economy of scale
• Better control concurrency
• Better backup and recovery procedures
They also provide

10. BUT
Its not always just
the
SUGAR

11. Disadvantages
• Higher costs
• Conversion cost
• More difficult recovery

12. Summary of DB
Pros n Cons
• A very useful approach for data
processing Provide a
???

13. Data As Resource
Resource
Any asset that is of
value to an organization
and that incurs cost

14. Is Data
A Resource ? ? ?
Data As Resource

15. Levels of Data
• Real-world data
• Metadata
• Data Occurrence

16. Database Users
• Application Programmers
• End Users
–Naïve
–Sophisticated

17. Database Users
• Database Administrator (DBA)
A person who has central control over
data and programs that access this data

18. Functions of DBA
Schema definition
Granting data access

19. Functions of DBA
Routine Maintenance
Backups
Monitoring disk space
Monitoring jobs running

20. Data, Database, Data Model and DBMS
Database
DBMS
“How” to get
Application Programs
“What” to get
End users
interact
Application
Programmers
Database
Administrators
Database
Designers
develop
maintain
design
Software
Users
Data

21. LOOK
we are approaching
THE END

22. Common Terms
• Data
• Information
• Database Management system
(DBMS)

23. Common Terms
• Data: Facts concerning things, such as
people, objects, or events

24. Common Terms
• Information: Data that have been processed
and presented in a form suitable for human
interpretation

25. Data, Information
and Knowledge
Data Information Knowledge &
Customer Insight
Tahira
Amir
Jahangir
TedMartin
AmexGold
50,000
234
wireless
B.A.
Amir
Mohsin
Tahira
Jahangir
50,000
46,800
29,200
75,500
Shoes
Scarves
Jewelry
Groceries
shoes
MoU
Qty
Income
Education
Database
Queries ?
Amir is most
likely to buy new
product
Tahira is profitable
customer and is likely
to switch carriers

26. DBMS:
A software that handles all access to
the database
Common Terms

27. DBMS:
A software that is responsible for applying
the authorisation checks and validation
procedures
Common Terms

28. Database
Management
Systems
Lecture -2