introduction to dbms

1. Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

2. Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

3. Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

4. Introduction To Database
• Data
• Information
• Knowledge
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

5. Need for Information
• Addition Knowledge
•Decision making
• Can apply in different levels
• Increase in ProductivityPrepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

6. DATABASE
• Inter related data with controlled redundancy
• used by different people
• Independent
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

7. Why Database ????
(advantages over traditional file systems)
1. Centralized control
2. Redundancy can be reduced
3. Inconsistency can be avoided
4. Data can be shared
5. Standard can be enforced
6. Security restriction can be applied
7. Integrity can be maintained
8. Conflicting requirements can be balanced
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

8. 1. Centralized control:
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

9. 2. Redundancy can be reduced:
Note: Sometimes redundancy is allowed
(Because of some technical & business reasons we need to
store multiple data ) Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

10. 3. Inconsistency can be avoided
4. Data Can be shared
5. Standard can be enforced
6. Security restriction can be applied
7. Integrity can be maintained
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

11. 8. Conflicting requirement can be balanced
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

12. CHARACTERISTICS OF DATA IN DATABASE
•Shared
•Persistence : It means the data exist permanently
,beyond the scope of the process
•Validity/Integrity/Correctness
•Security
•Consistency
•Non- redundancy
•Independence : ( we will discuss it later)
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

13. TYPES OF DATABASE
Centralized
Distributed
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

14. DATA BASE MANAGEMENT SYSTEM
•It is a collection of programs that enables you to store
,modify data and extract information from a database.
•It varies from small to large
•It is a piece of software that provides services for
accessing a database
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

15. COMPONENTS OF DBMS
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

16. •Transaction Management
•Concurrency Control
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

17. •Recovery Management
• Return to a consistent state
•Security Management
• Protection against unauthorized access
• Different privileges
•Language Interface
• Data structure creation : DDL
• Manipulation of data : DML
•Storage Management
• Permanent storage
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW

18. •Data Catalog Management
• Also known as data dictionary
• contains metadata
• Helpful to know the structure
Prepared by Visakh V, Assistant
Professor,Dept. of CSE, LBSITW