DBMS

Session – 1

Session Name: Introduction to Database Management System

Author Name: Swati JainDepartment: Computer science

Subject/Course: DBMSCell Number: 9893980599

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Session Objectives

At the end of this session, the learner will be able to:

Define the concept of a file processing system.

Identify the drawbacks of file processing system.

Define the terms redundancy, isolation, inconsistency, atomicity

and security.

Define the terms data, database and DBMS.

Identify the applicability of DBMS.

Teaching Learning Material

Board and ChalkPower Point Presentation

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Session Plan

Time(in min)

ContentLearning Aid

and Methodology

Faculty Approach

Typical Student Activity

Learning Outcomes(Blooms + Gardeners)

10Introduction to

FPS

Chalk and TalkPPT

IntroducesExplains

ComprehendsListens

ComprehensionUnderstandingIntrapersonal

10

Disadvantages of File

Processing System

Execute andUnderstand

FacilitatesObservesAnswers

ComprehensionIntrapersonalInterpersonal

Linguistic

10

Disadvantages of File

Processing System

(Atomicity, Security)

Role Play FacilitatesParticipatesObserves

ComprehensionIntrapersonalInterpersonalKinestheticLinguistic

10 Need for DBMSChalk and

Talk FacilitatesParticipates

Answers

ComprehensionIntrapersonal

Linguistic

12

Application of DBMS

Chalk and Talk

Group Discussion

Explains & conducts

ComprehendsParticipate

UnderstandingAnalyzingApplying

IntrapersonalLinguistic

08Conclusion

Question andAnswers

FacilitatesMonitors

ParticipatesAnswers

RememberingUnderstandingComprehension

IntrapersonalLinguistic

Session InputsPage 4 Ver : 1 Introduction to DBMS Swati Jain, TIETECH Jabalpur

Introduction to File Processing System:

We can start the session by explaining first what is meant by FPS.

File: A collection of records or documents dealing with one organization, person, area or subject

Manual (paper) filesComputer files

Record: Logically connected fields that describe a person, place or thing.

Suggested Activity: PPTThe following picture can be shown to the learner for understanding file system.Significance of application programs can be explained for the given example.

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After explaining the definition of FPS, we can list the disadvantages

of File Processing System.

Disadvantages of FPS:1. Redundancy- Different and conflicting versions of same data.

2. Inconsistency- Lack of data integrity.

3. Isolation- Limited data sharing

4. Atomicity

5. Security

After explaining terms of Redundancy, Inconsistency and Isolation,

we can role play for Atomicity and Security.

Suggested Activity (for Atomicity): Role PlayHere in this role play two of the learners will act as Bank Accounts A and B

respectively, another learner C acts as a Transaction, and learner D acts as a

visitor.

Learner A: I have 100 rupees with me.

Learner B: I have 50 rupees with me.

Learner C comes and picks 100 rupees from learner A and starts walking

towards learner B. Before he/she reaches learner B, learner C is called by the

visitor learner D.

After sometime C analyses the previous situation. He/she thinks of 2 options:

Either he/she can give back Rs.100 to learner A or give to learner B.

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The learners are asked to analyze what the play depicts.

This depicts that the transaction should be either done

completely or it is not be done at all. This is called Atomicity

and it is a disadvantage of FPS.

Suggested Activity (for Security): Role PlayHere in this role play two of the learners A and B.

Learner 1: My dear friend I have well featured mobile with me in my bag.

Learner 2: Oh is it!!

After some time learner 1 leaves the class but forgets to take his mobile.

Then Learner 2 comes in and takes away the mobile.

This depicts that there is no proper security provided which is one of the

major disadvantage of FPS.

Need For DBMS:

Now that we have discussed the disadvantages of FPS. Since the file

system management has problems like repetition of data, integration

problem etc, we need some new system that will reduce these

problems. Hence we prefer the concept of database management

system in place of file system for the data storage requirements.

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Now, we can start explaining: What is meant by data?What a data base? What a data base management system?

We can take examples of a college, a hospital, a bank, and a company etc to explain the same.

If we consider our college we have several branches and in turn each branch contains two sections. Means, we have large volumes of student details that includes student_rollno, student_name, student_address, student_marks etc. This is data about students.

Besides, we have data about teaching and non-teaching staff details. That is, our college consists of voluminous data, which will not fit into a single file.Hence, we need more storage capacity to store the entire data. So, we can prefer a database. Henceforth, we can create a database for the college.

In order to access data about student or staff, we need software to extract.

Hence, I can conclude that we have:Data about: student, teaching staff, non-teaching staff.Database: the entire college data.Software: to extract the data.

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Data is nothing but processed information. Database is a collection of data about one particular enterprise.DBMS is a software system that facilitates the creation and maintenance and use of an electronic database. It is a set of computer programs for organizing the information in the database.

Applications of DBMS:

Having introduced the DBMS concept to the learners, we can now help them to identify the various applications of the DBMS. For this we can have a group discussion activity as follows.

Suggested Activity: Group Discussion

We can divide the class into groups. Each group may have 7-8 learners. Ask the groups to list out the application areas of DBMS. Each group should come up with the maximum number of application areas of DBMS. Allotted time is 5 minutes.Sample applications could be:1. Banking: all transactions.2. Airlines: reservations, schedules.3. Universities: registration, grades.4. Sales: customers, products, purchases.5. Online retailers: order tracking, customized recommendations.6. Manufacturing: production, inventory, orders, supply chain.7. Human resources: employee records, salaries, tax deductions.

Apart from these applications, the various applications of DBMS in other fields can also be listed below:

Distributed databasesData warehouseMultimedia databasesDigital Libraries:

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Conclusion:

We can conclude the session with some questions based on the

concepts discussed in the session.

Suggested Activity: Question and Answer

1. What is a FPS?

2. List some of the disadvantages of File Processing System?

3. What is data, database and database management system?

What are the applications of DBMS?

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Summary

In this session, we learnt to:

1. Define the concept of a file processing system.

2. Identify the drawbacks of the file system.

3. Define the terms file system, data, database and DBMS.

4. Identify the application of DBMS.

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Assignment

1. What is difference between file system and DBMS?

2. Build a case study (like student/library management system) related to DBMS concept, where adding more data, modifying data, retrieving data like facilities are available.

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References

Database Management Systems by Silberchatz, Korth and Sudarshan.

Fundamentals of Data Base Systems by Elmasri Navathe.

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