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Slide 1 introduction to dbms
This document introduces databases and database management systems. It defines what a database is as interrelated data with controlled redundancy that can be used by different people independently. It lists advantages of databases over traditional file systems such as centralized control, reduced redundancy, avoiding inconsistency, enabling data sharing, enforcing standards, applying security restrictions, maintaining integrity, and balancing conflicting requirements. It also describes characteristics of data in databases, types of databases, components of a database management system, and the functions of those components.
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Slide 1 introduction to dbms
- 1. Prepared by VisakhV, Assistant Professor,Dept. of CSE, LBSITW
- 2. Prepared by VisakhV, Assistant Professor,Dept. of CSE, LBSITW
- 3. Prepared by VisakhV, 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 relateddata with controlled redundancy • used by different people • Independent Prepared by Visakh V, Assistant Professor,Dept. of CSE, LBSITW
- 7. Why Database ???? (advantagesover 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: Preparedby Visakh V, Assistant Professor,Dept. of CSE, LBSITW
- 9. 2. Redundancy canbe 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 canbe 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 requirementcan be balanced Prepared by Visakh V, Assistant Professor,Dept. of CSE, LBSITW
- 12. CHARACTERISTICS OF DATAIN 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 Preparedby Visakh V, Assistant Professor,Dept. of CSE, LBSITW
- 14. DATA BASE MANAGEMENTSYSTEM •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 Preparedby Visakh V, Assistant Professor,Dept. of CSE, LBSITW
- 16. •Transaction Management •Concurrency Control Preparedby Visakh V, Assistant Professor,Dept. of CSE, LBSITW
- 17. •Recovery Management • Returnto 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