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DBMS
This document provides an overview and introduction to a lecture on database management systems (DBMS). It discusses how companies are increasingly data-driven and how this class will teach the basics of using and managing data. The lecture will cover the motivation for studying DBMS, an overview of the subject, and course logistics. The goal is for students to understand fundamental database concepts and be able to design, query, and build applications with databases.
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DBMS
- 1. Database Management System(DBMS) Lecture 0 ShikhaGautam Asst. professor, CSE || Shri Hari ||
- 2. “Data is theFuture” SHIKHA GAUTAM
- 4. Increasingly many companiessee themselves as data driven. SHIKHA GAUTAM
- 5. The world isincreasingly driven by data… This class teaches the basics of how to use & manage data. SHIKHA GAUTAM
- 6. More Data • Storingall 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 • Storingall 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 willlearn in this Lecture 1. Motivation for studying DBMS 2. Overview of Subject 3. Administrative structure 4. Course logistics SHIKHA GAUTAM
- 9. Why should youstudy 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 andCareers 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? • Usedin almost all modern settings involving data management: • Business • Research • Administration SHIKHA GAUTAM
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- 14. Other databases youmay use SHIKHA GAUTAM
- 16. What this courseis • 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 slidescover 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 andText Books • Text Book:- 1. DATABASE SYSTEM CONCEPTS by Korth 1. Fundamentals of Database Systems by Navathe SHIKHA GAUTAM
- 20. What is aDBMS? • 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
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- 22. Simplified database systemenvironment
- 23. A Motivating, RunningExample • Consider building a course management system (CMS): • Students • Courses • Professors • Who takes what • Who teaches what Entities Relationships SHIKHA GAUTAM
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- 25. Course Objectives • Uponcompletion 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 toDBMS • 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 DBMSas Subject SHIKHA GAUTAM
- 28. Introduction to DBMSUnit1 • Data,Database,characteristics etc. • Data model, Data Independence • Three Schema Architecture SHIKHA GAUTAM
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- 31. Contd. Overall Structure ofDBMS Unit1 SHIKHA GAUTAM
- 32. Relational Data modelConcepts Unit 2 • E-R Notations & Diagram • Eg: • Mapping Cardinality PSIT-COESHIKHA GAUTAM
- 33. Contd. Unit 2 SQL(StructuredQuery Language) SHIKHA GAUTAM
- 34. Normalization Unit 3 •Need of Normalization • Normal Forms SHIKHA GAUTAM
- 35. Transaction Control SystemUnit 4 • State Transition Diagram • Acid Properties
- 36. Transactions • A keyconcept 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 DBMSmakes 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 expectedfrom 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
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