This ppt will help you to understand basics and need of dbms.

1. Database Management
System(DBMS)
Lecture 0
Shikha Gautam
Asst. professor,
CSE
|| Shri Hari ||

2. “Data is the Future”
SHIKHA GAUTAM

4. Increasingly many companies see
themselves as data driven.
SHIKHA GAUTAM

5. The world is increasingly
driven by data…
This class teaches the basics of
how to use & manage data.
SHIKHA GAUTAM

6. More Data
• Storing all data – including machine generated and sol, Social,
community, demographic data in original format – for ever
To More Effect
• Smarter use of data to achieve competitive or human benefit

7. More Data
• Storing all data – including machine generated and sol, Social,
community, demographic data in original format – for ever
To More Effect
• Smarter use of data (data science) to achieve competitive or human
benefit

8. What you will learn in this Lecture
1. Motivation for studying DBMS
2. Overview of Subject
3. Administrative structure
4. Course logistics
SHIKHA GAUTAM

9. Why should you study databases?
• Make more $$$:
• Startups need DB talent right away = low employee #
• Massive industry…
• Intellectual:
• Science: data poor to data rich
• No idea how to handle the data!
• Fundamental ideas to/from all of CS:
• Systems, theory, AI, logic, stats, analysis….
Many great computer systems ideas started in DB.
SHIKHA GAUTAM

11. Oracle Internships and Careers
Summer Internship Program
http://www.oracle.com/us/corporate/careers/college/internships/064881.html
Oracle’s College Recruiting Site
http://www.oracle.com/us/corporate/careers/college/index.html
Oracle Careers
http://www.oracle.com/us/corporate/careers/index.html

12. Why DBMS?
• Used in almost all modern settings involving data management:
• Business
• Research
• Administration
SHIKHA GAUTAM

13. Database Systems: Today
SHIKHA GAUTAM

14. Other databases you may use
SHIKHA GAUTAM

16. What this course is
• Discuss fundamentals of data management
• How to design databases, query databases, build applications with them.
• How to debug them when they go wrong!
• How to tune Oracle 11g.
• We’ll cover how database management systems work
SHIKHA GAUTAM

17. Lectures
• Lecture slides cover essential material
• This is your best reference.
• Try to cover same thing in many ways: Lecture, lecture notes,
homework, exams
• Attendance makes your life easier…
• All lectures are mandatory!
SHIKHA GAUTAM

18. Acknowledgements
• NPTEL
• Course
• Internet
SHIKHA GAUTAM

19. Course details and Text Books
• Text Book:-
1. DATABASE SYSTEM CONCEPTS
by Korth
1. Fundamentals of Database Systems
by Navathe
SHIKHA GAUTAM

20. What is a DBMS?
• A large, integrated collection of data
• Models a real-world enterprise
• Entities (e.g., Students, Courses)
• Relationships (e.g., Alice is enrolled in 145)
A Database Management System (DBMS) is a
piece of software designed to store and
manage databases
SHIKHA GAUTAM

21. SHIKHA GAUTAM

22. Simplified database system environment

23. A Motivating, Running Example
• Consider building a course management system (CMS):
• Students
• Courses
• Professors
• Who takes what
• Who teaches what
Entities
Relationships
SHIKHA GAUTAM

24. 24

25. Course Objectives
• Upon completion of this course, the student should be able to:
• Understand different DBMS
• Create their own Tables
• Manipulate data stored in it
• Construct ER Diagram
• Conversion of ER diagram to Table
• Able to normalize the table
• Describe the definitions and properties of Transactions and concurrency
control
• Will able to analyze multiple granularity and recovery
SHIKHA GAUTAM

26. Syllabus
• Introduction to DBMS
• E-R model concepts
• Reduction of E-R diagrams to tables
• Integrity Constraints
• Relational Algebra and Calculus
• SQL
• Functional Dependencies and Normal Forms
• Transaction System and Serializability
• Deadlock Handling
• Concurrency Control and Recovery
• Case Study
SHIKHA GAUTAM

27. Overview of DBMS as Subject
SHIKHA GAUTAM

28. Introduction to DBMS Unit1
• Data,Database,characteristics etc.
• Data model, Data Independence
• Three Schema Architecture
SHIKHA GAUTAM

29. Unit1
SHIKHA GAUTAM

30. PSIT COE
Unit1
SHIKHA GAUTAM

31. Contd.
Overall Structure of DBMS
Unit1
SHIKHA GAUTAM

32. Relational Data model Concepts Unit 2
• E-R Notations & Diagram
• Eg:
• Mapping Cardinality
PSIT-COESHIKHA GAUTAM

33. Contd. Unit 2
SQL(Structured Query Language)
SHIKHA GAUTAM

34. Normalization Unit 3
• Need of Normalization
• Normal Forms
SHIKHA GAUTAM

35. Transaction Control System Unit 4
• State Transition Diagram
• Acid Properties

36. Transactions
• A key concept is the transaction (TXN): an atomic
sequence of db actions (reads/writes)
Atomicity: An action
either completes
entirely or not at all
36
Acct Balance
a10 20,000
a20 15,000
Acct Balance
a10 17,000
a20 18,000
Transfer $3k from a10 to a20:
1. Debit $3k from a10
2. Credit $3k to a20
• Crash before 1,
• After 1 but before 2,
• After 2.
Written naively, in
which states is
atomicity preserved?
DB Always
preserves
atomicity!
Unit 4
SHIKHA GAUTAM

37. Concurrency Control & Locking Unit 5
• Concurrency Control
• Locking Techniques
PSIT-COE

38. A Well-Designed DBMS makes many people
happy!
• End users and DBMS vendors
• Reduces cost and makes money
• DB application programmers
• Can handle more users, faster, for cheaper, and with better
reliability / security guarantees!
• Database administrators (DBA)
• Easier time of designing logical/physical schema, handling
security/authorization, tuning, crash recovery, and more…
Must still understand
DB internals
SHIKHA GAUTAM

39. What is expected from you
• Attend lectures
• If you don’t, it’s at your own peril
• Be active and think critically
• Do programming and homework projects
• Start early and be honest
• Study for tests and exams
SHIKHA GAUTAM

40. Summary of DBMS
• DBMS are used to maintain, query, and manage large datasets.
• Provide concurrency, recovery from crashes, quick application development,
integrity, and security
• Key abstractions give data independence
• DBMS R&D is one of the broadest, most exciting fields in CS. Fact!
SHIKHA GAUTAM

41. SHIKHA GAUTAM