Objective. The goal is to review material covered in Chapters 1-5. Do the following questions from the book.

Size: px
Start display at page:

Download "Objective. The goal is to review material covered in Chapters 1-5. Do the following questions from the book."

Transcription

1 CSCE 4523 Assignment 2 - Due Sunday, Feb. 19, 2017; 11:59pm on Blackboard This assignment may be done in pairs (undergrads only). Grad students must do the assignment individually. Objective The goal is to review material covered in Chapters 1-5. Do the following questions from the book. Short answer questions and point form answers are fine. All answers that are just text/words should be done in a word processor. Diagrams may be handdrawn. 1.8 (List 3 advantages and 2 disadvantages) b, d, & f (Also show the relations (tuples) that would be created) 5.12 b, d, f (Relational Algebra Only) 5.18 (Relational Algebra Only)

2 Answers 1.8 Discuss the advantages and disadvantages of database management systems (list 3 advantages and 2 disadvantages) Advantages: 1. Definition of data is stored separately and independently 2. Control over access and defining different security level 3. Manipulation of data is independent of application program 4. Control of data redundancy 5. Data consistency 6. Sharing of data Disadvantages: 1. Storage for keeping data is big 2. Cost of DBMS, which is very high 2.2 To address the issue of data independence, the ANSI-SPARC three-level architecture was proposed. Compare and contrast the three levels of this model. External: the way users perceive the data Conceptual: provides both the mapping and the desired independence between the external and internal level. The conceptual level represents all entities, their attributes, and their relationships, as well as the constraints on the data, and security and integrity information Internal: the way the DBMS and OS perceive the data. This specifies how data is represented, how records are sequenced, what indexes and pointers exist, and so on 2.14 Define the term "database integrity". How does database integrity differ from database security? Database integrity refers to the correctness and consistency of stored data: it can be considered as another type of database protection. Although integrity is related to security, it has wider implications: integrity is concerned with the quality of data itself. Integrity is usually expressed in terms of constraints, which are consistency rules that the database is not permitted to violate. Database security used to protect and secure a database or database management software from illegal users and malicious threats and attacks Compare and contrast the four main deployment models for the cloud. The four main deployment models for the cloud are: Private cloud: cloud infrastructure operated solely for a single organization, whether managed internally by the organization, a third party, or some combination of them, and it may be hosted internally or externally. Community cloud: cloud infrastructure is shared for exclusive use by a specific community of organizations that have common concerns (e.g., security requirements, compliance,

3 jurisdiction). It may be owned, managed, and operated by one or more of the organizations in the community, a third party, or some combination of them, and it may be hosted internally or externally. Public cloud: cloud infrastructure is made available to the general public by a service provider. These services are free or offered on a pay-per-use model. It may be owned, managed, and operated by a business, academic, or government organization, or some combination of these. It exists on the premises of the cloud provider. Hybrid cloud: cloud infrastructure is a composition of two or more distinct cloud infrastructures (private, community, or public) that remain unique entities, but are bound together by standardized or proprietary technology, offering the benefits of multiple deployment models. 4.5 Discuss the differences between the candidate keys and the primary key of a relation. Explain what is meant by a foreign key. How do foreign keys of relations relate to candidate keys? Give examples to illustrate your answer. The primary key is the candidate key that is selected to identify tuples uniquely within a relation. A table may have several candidate key, one of them can be selected as primary key. A foreign key is an attribute or set of attributes within one relation that matches the candidate key of some (possibly the same) relation. For instance, there are two tables, Branch and Staff with following structure like: Branch (branchno, street, city, postcode) Staff (staffno, fname, lname, position, sex, DOB, salary, branchno) The inclusion of branchno in both Branch and Staff relations links each branch to the details of staff working at that branch. In the Branch relation, branchno is primary key. However, in the Staff relation, the branchno attribute matches staff to the branch office they work. In the Staff relation the branchno is foreign key. We say that the attribute branchno in the Staff relation targets the primary key attribute branchno in the home relation, Branch. 4.8 Identify the foreign keys in this schema. Explain how the entity and referential integrity rules apply to these relations. For each relation, the primary key must not contain any nulls. Room is related to Hotel through the attribute hotelno. Therefore, the hotelno in Room should either be null or contain the number of an existing hotel in the Hotel relation. In this case study, it would probably be unacceptable to have a hotelno in Room with a null value. Booking is related to Hotel through the attribute hotelno. Therefore, the hotelno in Booking should either be null or contain the number of an existing hotel in the Hotel relation. However, because hotelno is also part of the primary key, a null value for this attribute would be unacceptable. Similarly for guestno. Booking is also related to Room through the attribute roomno. 5.8 Describe the relations that would be produced by the following relational algebra operations: (b) σ Hotel.hotelNo = Room.hotelNo (Hotel Room)

4 This will produce a join of the Hotel and Room relations containing all the attributes of both Hotel and Room (there will be two copies of the hotelno attribute). Essentially this will produce a relation containing all rooms at all hotels. Therefore, we have a relation with the following attributes: (hotelno, hotelname, city, roomno, hotelno, type, price) (d) Guest (σ dateto 1-Jan-2007 (Booking)) This will produce a (left outer) join of Guest and those tuples of Booking with an end date (dateto) greater than or equal to 1-Jan All guests who don t have a booking with such a date will still be included in the join. Essentially this will produce a relation containing all guests and show the details of any bookings they have beyond 1-Jan Therefore, the result includes the following attributes: (guestno, guestname, guestaddress, hotelno, datefrom, dateto, roomno) (e) Hotel Hotel.hotelNo = Room.hotelNo (σ price > 50 (Room)) ) This will produce a (semi) join of Hotel and those tuples of Room with a price greater than 50. Only those Hotel attributes will be listed. Essentially this will produce a relation containing all the details of all hotels with a room price above 50. Therefore, the result includes all attributes from Hotel relation like: (hotelno, hotelname, city) (f) Π guestname, hotelno (Booking Booking.guestNo = Guest.guestNo Guest) Π hotelno (σ city = London (Hotel)) This will produce a relation containing the names of all guests who have booked all hotels in London. The result includes two attributes as guestno, hotelno 5.12 Generate the relational algebra, tuple relational calculus, and domain relational calculus expressions for the following queries: (b) -- List all single rooms with a price below 20 per night. σ type= S price < 20(Room) (d) -- List the price and type of all rooms at the Grosvenor Hotel. Π price, type (Room hotelno (σ hotelname = Grosvenor Hotel (Hotel))) (f) -- List the details of all rooms at the Grosvenor Hotel, including the name of the guest staying in the room, if the room is occupied. (Room hotelno (σ hotelname = Grosvenor Hotel (Hotel))) // Outer Join Π guestname, hotelno, roomno (

5 (Guest guestno (σ datefrom dateto ( Booking hotelno (σ hotelname= Grosvenor Hotel (Hotel)))) (substitute for today s date) Produce a list of the names of all employees who work on the SCCS project. Π fname, lname (Employee empno (WorksOn projno (σ projname = SCCS (Project)))

Chapter 6. SQL: SubQueries

Chapter 6. SQL: SubQueries Chapter 6 SQL: SubQueries Pearson Education 2009 Definition A subquery contains one or more nested Select statements Example: List the staff who work in the branch at 163 Main St SELECT staffno, fname,

More information

Lecture 03. Spring 2018 Borough of Manhattan Community College

Lecture 03. Spring 2018 Borough of Manhattan Community College Lecture 03 Spring 2018 Borough of Manhattan Community College 1 2 Outline 1. Brief History of the Relational Model 2. Terminology 3. Integrity Constraints 4. Views 3 History of the Relational Model The

More information

Lecture 03. Fall 2017 Borough of Manhattan Community College

Lecture 03. Fall 2017 Borough of Manhattan Community College Lecture 03 Fall 2017 Borough of Manhattan Community College 1 2 Outline 1 Brief History of the Relational Model 2 Terminology 3 Integrity Constraints 4 Views 3 History of the Relational Model The Relational

More information

Database Technologies. Madalina CROITORU IUT Montpellier

Database Technologies. Madalina CROITORU IUT Montpellier Database Technologies Madalina CROITORU croitoru@lirmm.fr IUT Montpellier Part 2 RELATIONAL ALGEBRA Background notions I A database relation is a set. Sets can be refined: One can select a subset of elements

More information

2.8.1 Practicals Question Bank Algebra Unit-I 1. Show that {1, 2, 3} under multiplication modulo 4 is not a group but that {1, 2, 3, 4} under multiplication modulo 5 is a group. 2. Let G be a group with

More information

Database Systems. A Practical Approach to Design, Implementation, and Management. Database Systems. Thomas Connolly Carolyn Begg

Database Systems. A Practical Approach to Design, Implementation, and Management. Database Systems. Thomas Connolly Carolyn Begg Database Systems A Practical Approach to Design, Implementation, and Management For these Global Editions, the editorial team at Pearson has collaborated with educators across the world to address a wide

More information

SQL DDL. Intro SQL CREATE TABLE ALTER TABLE Data types Service-based database in Visual Studio Database in PHPMyAdmin

SQL DDL. Intro SQL CREATE TABLE ALTER TABLE Data types Service-based database in Visual Studio Database in PHPMyAdmin SQL DDL Intro SQL CREATE TABLE ALTER TABLE Data types Service-based database in Visual Studio Database in PHPMyAdmin Steen Jensen, autumn 2017 Languages Languages for relational DBMSs are: SQL QBE Structured

More information

PART III SOLUTIONS TO REVIEW QUESTIONS AND EXERCISES

PART III SOLUTIONS TO REVIEW QUESTIONS AND EXERCISES PART III SOLUTIONS TO REVIEW QUESTIONS AND EXERCISES Solutions to Review Questions and Exercises Part One Background 4 Chapter 1 Introduction to Databases... 4 Chapter 2 Database Environment... 6 Chapter

More information

RELATIONAL DATA MODEL

RELATIONAL DATA MODEL RELATIONAL DATA MODEL EGCO321 DATABASE SYSTEMS KANAT POOLSAWASD DEPARTMENT OF COMPUTER ENGINEERING MAHIDOL UNIVERSITY RELATIONAL DATA STRUCTURE (1) Relation: A relation is a table with columns and rows.

More information

CMP-3440 Database Systems

CMP-3440 Database Systems CMP-3440 Database Systems Relational DB Languages Relational Algebra, Calculus, SQL Lecture 05 zain 1 Introduction Relational algebra & relational calculus are formal languages associated with the relational

More information

1 P a g e D a t a b a s e o l d p a p e r b y w a s i m

1 P a g e D a t a b a s e o l d p a p e r b y w a s i m 1 P a g e D a t a b a s e o l d p a p e r b y w a s i m Q#1. What is concurrency control? Ans: Concurrency control (CC) is a process to ensure that data is updated correctly andappropriately when multiple

More information

Relational Model. Rab Nawaz Jadoon DCS. Assistant Professor. Department of Computer Science. COMSATS IIT, Abbottabad Pakistan

Relational Model. Rab Nawaz Jadoon DCS. Assistant Professor. Department of Computer Science. COMSATS IIT, Abbottabad Pakistan Relational Model DCS COMSATS Institute of Information Technology Rab Nawaz Jadoon Assistant Professor COMSATS IIT, Abbottabad Pakistan Management Information Systems (MIS) Relational Model Relational Data

More information

Two hours UNIVERSITY OF MANCHESTER SCHOOL OF COMPUTER SCIENCE

Two hours UNIVERSITY OF MANCHESTER SCHOOL OF COMPUTER SCIENCE COMP 60711 Two hours UNIVERSITY OF MANCHESTER SCHOOL OF COMPUTER SCIENCE Data Engineering Date: Thursday 25th January 2018 Time: 09:45-11:45 Please answer ONE Question from Section A and ONE Question from

More information

CS317 File and Database Systems

CS317 File and Database Systems CS317 File and Database Systems Lecture 4 Intro to SQL (Chapter 6 - DML, Chapter 7 - DDL) September 17, 2018 Sam Siewert Backup to PRClab1.erau.edu If PRClab1.erau.edu is down or slow Use SE Workstation

More information

6.9 List the names and addresses of all guests in London, alphabetically ordered by name.

6.9 List the names and addresses of all guests in London, alphabetically ordered by name. ADDITIONAL EXERCISES FOR DATABASE SQL 6.7 List full details of all hotels. SELECT * FROM Hotel; 6.8 List full details of all hotels in London. SELECT * FROM Hotel WHERE city = London ; 6.9 List the names

More information

Chapter 5. Relational Algebra and Relational Calculus

Chapter 5. Relational Algebra and Relational Calculus Chapter 5 Relational Algebra and Relational Calculus Overview The previous chapter covers the relational model, which provides a formal description of the structure of a database This chapter covers the

More information

3ISY402 DATABASE SYSTEMS

3ISY402 DATABASE SYSTEMS 3ISY402 DATABASE SYSTEMS - SQL: Data Definition 1 Leena Gulabivala Material from essential text: T CONNOLLY & C BEGG. Database Systems A Practical Approach to Design, Implementation and Management, 4th

More information

2.2.2.Relational Database concept

2.2.2.Relational Database concept Foreign key:- is a field (or collection of fields) in one table that uniquely identifies a row of another table. In simpler words, the foreign key is defined in a second table, but it refers to the primary

More information

Relational model continued. Understanding how to use the relational model. Summary of board example: with Copies as weak entity

Relational model continued. Understanding how to use the relational model. Summary of board example: with Copies as weak entity COS 597A: Principles of Database and Information Systems Relational model continued Understanding how to use the relational model 1 with as weak entity folded into folded into branches: (br_, librarian,

More information

Lecture4: Guidelines for good relational design Mapping ERD to Relation. Ref. Chapter3

Lecture4: Guidelines for good relational design Mapping ERD to Relation. Ref. Chapter3 College of Computer and Information Sciences - Information Systems Dept. Lecture4: Guidelines for good relational design Mapping ERD to Relation. Ref. Chapter3 Prepared by L. Nouf Almujally & Aisha AlArfaj

More information

CS403- Database Management Systems Solved Objective Midterm Papers For Preparation of Midterm Exam

CS403- Database Management Systems Solved Objective Midterm Papers For Preparation of Midterm Exam CS403- Database Management Systems Solved Objective Midterm Papers For Preparation of Midterm Exam Question No: 1 ( Marks: 1 ) - Please choose one Which of the following is NOT a feature of Context DFD?

More information

CS403- Database Management Systems Solved MCQS From Midterm Papers. CS403- Database Management Systems MIDTERM EXAMINATION - Spring 2010

CS403- Database Management Systems Solved MCQS From Midterm Papers. CS403- Database Management Systems MIDTERM EXAMINATION - Spring 2010 CS403- Database Management Systems Solved MCQS From Midterm Papers April 29,2012 MC100401285 Moaaz.pk@gmail.com Mc100401285@gmail.com PSMD01 CS403- Database Management Systems MIDTERM EXAMINATION - Spring

More information

CS317 File and Database Systems

CS317 File and Database Systems CS317 File and Database Systems Lecture 3 Relational Calculus and Algebra Part-2 September 10, 2017 Sam Siewert RDBMS Fundamental Theory http://dilbert.com/strips/comic/2008-05-07/ Relational Algebra and

More information

GUJARAT TECHNOLOGICAL UNIVERSITY

GUJARAT TECHNOLOGICAL UNIVERSITY Seat No.: Enrolment No. GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER III (NEW) - EXAMINATION SUMMER 2017 Subject Code: 21303 Date: 02/06/2017 Subject Name: Database Management Systems Time: 10:30 AM

More information

Example 1 - Create Horizontal View. Example 2 - Create Vertical View. Views. Views

Example 1 - Create Horizontal View. Example 2 - Create Vertical View. Views. Views Views Views RECALLS: View Dynamic result of one or more relational operations operating on the base relations to produce another relation. o Virtual relation that does not actually exist in the database

More information

Relational Data Model ( 관계형데이터모델 )

Relational Data Model ( 관계형데이터모델 ) Relational Data Model ( 관계형데이터모델 ) Outline Terminology of Relational Model Mathematical Relations and Database Tables Candidate, Primary, and Foreign Keys Terminology in the Relational Model Relation:

More information

Theory 2 Hours/Week 2 credits

Theory 2 Hours/Week 2 credits SEC 1 [A] With Effect from the Academic Year 2017 2018 SciLab 1 BS301 Theory 2 Hours/Week 2 credits Introduction to Scilab what is scilab, downloading & installing scilab, a quick taste of scilab. The

More information

STRUCTURED QUERY LANGUAGE (SQL)

STRUCTURED QUERY LANGUAGE (SQL) STRUCTURED QUERY LANGUAGE (SQL) EGCO321 DATABASE SYSTEMS KANAT POOLSAWASD DEPARTMENT OF COMPUTER ENGINEERING MAHIDOL UNIVERSITY SQL TIMELINE SCOPE OF SQL THE ISO SQL DATA TYPES SQL identifiers are used

More information

DATABASE DEVELOPMENT (H4)

DATABASE DEVELOPMENT (H4) IMIS HIGHER DIPLOMA QUALIFICATIONS DATABASE DEVELOPMENT (H4) Friday 3 rd June 2016 10:00hrs 13:00hrs DURATION: 3 HOURS Candidates should answer ALL the questions in Part A and THREE of the five questions

More information

King Fahd University of Petroleum and Minerals

King Fahd University of Petroleum and Minerals 1 King Fahd University of Petroleum and Minerals Information and Computer Science Department ICS 334: Database Systems Semester 041 Major Exam 1 18% ID: Name: Section: Grades Section Max Scored A 5 B 25

More information

CS430 Final March 14, 2005

CS430 Final March 14, 2005 Name: W#: CS430 Final March 14, 2005 Write your answers in the space provided. Use the back of the page if you need more space. Values of questions are as indicated. 1. (4 points) What are the four ACID

More information

SQL grouping, views & modifying data

SQL grouping, views & modifying data SQL grouping, views & modifying data Grouping (GROUP BY) Views INSERT UPDATE DELETE Steen Jensen, autumn 2017 SQL query - grouping Grouping makes it possible to show information listed in groups Conditions

More information

Database Management Systems (Classroom Practice Booklet Solutions)

Database Management Systems (Classroom Practice Booklet Solutions) Database Management Systems (Classroom Practice Booklet Solutions) 2. ER and Relational Model 4 ssn cid 01. Ans: (b) Professor Teaches course 02. Ans: (c) Sol: Because each patient is admitted into one

More information

Institute of Southern Punjab, Multan

Institute of Southern Punjab, Multan Institute of Southern Punjab, Multan Mr. Muhammad Nouman Farooq BSC-H (Computer Science) MS (Telecomm. and Networks) Honors: Magna Cumm Laude Honors Degree Gold Medalist! Blog Url: noumanfarooqatisp.wordpress.com

More information

Database Technologies. Madalina CROITORU IUT Montpellier

Database Technologies. Madalina CROITORU IUT Montpellier Database Technologies Madalina CROITORU croitoru@lirmm.fr IUT Montpellier Course practicalities 2 x 2h per week (14 weeks) Basics of database theory relational model, relational algebra, SQL and database

More information

Chapter 4. The Relational Model

Chapter 4. The Relational Model Chapter 4 The Relational Model Chapter 4 - Objectives Terminology of relational model. How tables are used to represent data. Connection between mathematical relations and relations in the relational model.

More information

Introduction to Relational Databases. Introduction to Relational Databases cont: Introduction to Relational Databases cont: Relational Data structure

Introduction to Relational Databases. Introduction to Relational Databases cont: Introduction to Relational Databases cont: Relational Data structure Databases databases Terminology of relational model Properties of database relations. Relational Keys. Meaning of entity integrity and referential integrity. Purpose and advantages of views. The relational

More information

DATABASE MANAGEMENT SYSTEMS. UNIT I Introduction to Database Systems

DATABASE MANAGEMENT SYSTEMS. UNIT I Introduction to Database Systems DATABASE MANAGEMENT SYSTEMS UNIT I Introduction to Database Systems Terminology Data = known facts that can be recorded Database (DB) = logically coherent collection of related data with some inherent

More information

CS317 File and Database Systems

CS317 File and Database Systems CS317 File and Database Systems Lecture 3 Relational Model & Languages Part-1 September 7, 2018 Sam Siewert More Embedded Systems Summer - Analog, Digital, Firmware, Software Reasons to Consider Catch

More information

Lecture 05. Spring 2018 Borough of Manhattan Community College

Lecture 05. Spring 2018 Borough of Manhattan Community College Lecture 05 Spring 2018 Borough of Manhattan Community College 1 The Relational Calculus The relational algebra is a procedural language: a certain order is always explicitly specified in a relational algebra

More information

DATABASE MANAGEMENT SYSTEM

DATABASE MANAGEMENT SYSTEM DATABASE MANAGEMENT SYSTEM For COMPUTER SCIENCE DATABASE MANAGEMENT. SYSTEM SYLLABUS ER model. Relational model: relational algebra, tuple calculus, SQL. Integrity constraints, normal forms. File organization,

More information

Database Concepts and Applications

Database Concepts and Applications ,'.'. Page No... 1 MCA401 USN Fourth Semester M.C.ADegree Examination, July IAugust 2004 Master of Computer Applications (Old Scheme) Database Concepts and Applications Time: 3 hrs.] [Max.Marks : 100 Note:

More information

Name :. Roll No. :... Invigilator s Signature : DATABASE MANAGEMENT SYSTEM

Name :. Roll No. :... Invigilator s Signature : DATABASE MANAGEMENT SYSTEM Name :. Roll No. :..... Invigilator s Signature :.. CS/B.TECH(IT)/SEM-6/IT-604/2011 2011 DATABASE MANAGEMENT SYSTEM Time Allotted : 3 Hours Full Marks : 70 The figures in the margin indicate full marks.

More information

Relational Algebra and Relational Calculus. Pearson Education Limited 1995,

Relational Algebra and Relational Calculus. Pearson Education Limited 1995, Relational Algebra and Relational Calculus 1 Objectives Meaning of the term relational completeness. How to form queries in relational algebra. How to form queries in tuple relational calculus. How to

More information

Mahathma Gandhi University

Mahathma Gandhi University Mahathma Gandhi University BSc Computer science III Semester BCS 303 OBJECTIVE TYPE QUESTIONS Choose the correct or best alternative in the following: Q.1 In the relational modes, cardinality is termed

More information

Multiple-Choice. 3. When you want to see all of the awards, even those not yet granted to a student, replace JOIN in the following

Multiple-Choice. 3. When you want to see all of the awards, even those not yet granted to a student, replace JOIN in the following Database Design, CSCI 340, Spring 2015 Final, May 12 Multiple-Choice 1. Which of the following is not part of the vocabulary of database keys? (3 pts.) a. Referential key b. Composite key c. Primary key

More information

Basant Group of Institution

Basant Group of Institution Basant Group of Institution Visual Basic 6.0 Objective Question Q.1 In the relational modes, cardinality is termed as: (A) Number of tuples. (B) Number of attributes. (C) Number of tables. (D) Number of

More information

Chapter 6 - Part II The Relational Algebra and Calculus

Chapter 6 - Part II The Relational Algebra and Calculus Chapter 6 - Part II The Relational Algebra and Calculus Copyright 2004 Ramez Elmasri and Shamkant Navathe Division operation DIVISION Operation The division operation is applied to two relations R(Z) S(X),

More information

Copyright 2007 Ramez Elmasri and Shamkant B. Navathe Slide 25-1

Copyright 2007 Ramez Elmasri and Shamkant B. Navathe Slide 25-1 Copyright 2007 Ramez Elmasri and Shamkant B. Navathe Slide 25-1 Chapter 25 Distributed Databases and Client-Server Architectures Copyright 2007 Ramez Elmasri and Shamkant B. Navathe Chapter 25 Outline

More information

CMP-3440 Database Systems

CMP-3440 Database Systems CMP-3440 Database Systems Advanced SQL Lecture 07 zain 1 Select Statement - Aggregates ISO standard defines five aggregate functions: COUNT returns number of values in specified column. SUM returns sum

More information

Database Systems CSci 4380 Final Exam May 19, 2016

Database Systems CSci 4380 Final Exam May 19, 2016 Write your answers in the boxes provided only. Do not write on the back or outside the box. Database Systems CSci 4380 Final Exam May 19, 2016 RCS ID: @rpi.edu Name: RIN # : Rules. The exam is 120 minutes

More information

MIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: Time: 60 min Marks: 38

MIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: Time: 60 min Marks: 38 Student Info StudentID: Center: ExamDate: MIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: 1356458 Time: 60 min Marks: 38 BC080402322 OPKST 5/28/2010 12:00:00 AM

More information

Database Management Systems (Solutions for Vol 1_Classroom Practice Questions)

Database Management Systems (Solutions for Vol 1_Classroom Practice Questions) Database Management Systems (Solutions for Vol 1_Classroom Practice Questions) 2. ER and Relational Model 01. Ans: (b) 07. Ans: 1 ssn cid Derived attribute is an attribute that derives its value from one

More information

Fundamentals of Database Systems

Fundamentals of Database Systems Fundamentals of Database Systems Assignment: 2 Due Date: 18th August, 2017 Instructions This question paper contains 10 questions in 6 pages. Q1: Consider the following schema for an office payroll system,

More information

PES Institute of Technology Bangalore South Campus (1 K.M before Electronic City,Bangalore ) Department of MCA. Solution Set - Test-II

PES Institute of Technology Bangalore South Campus (1 K.M before Electronic City,Bangalore ) Department of MCA. Solution Set - Test-II PES Institute of Technology Bangalore South Campus (1 K.M before Electronic City,Bangalore 560100 ) Solution Set - Test-II Sub: Database Management Systems 16MCA23 Date: 04/04/2017 Sem & Section:II Duration:

More information

Data Modeling with the Entity Relationship Model. CS157A Chris Pollett Sept. 7, 2005.

Data Modeling with the Entity Relationship Model. CS157A Chris Pollett Sept. 7, 2005. Data Modeling with the Entity Relationship Model CS157A Chris Pollett Sept. 7, 2005. Outline Conceptual Data Models and Database Design An Example Application Entity Types, Sets, Attributes and Keys Relationship

More information

Chapter 2: Intro to Relational Model

Chapter 2: Intro to Relational Model Chapter 2: Intro to Relational Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Example of a Relation attributes (or columns) tuples (or rows) 2.2 Attribute Types The

More information

Relational Model History. COSC 416 NoSQL Databases. Relational Model (Review) Relation Example. Relational Model Definitions. Relational Integrity

Relational Model History. COSC 416 NoSQL Databases. Relational Model (Review) Relation Example. Relational Model Definitions. Relational Integrity COSC 416 NoSQL Databases Relational Model (Review) Dr. Ramon Lawrence University of British Columbia Okanagan ramon.lawrence@ubc.ca Relational Model History The relational model was proposed by E. F. Codd

More information

Review for Exam 1 CS474 (Norton)

Review for Exam 1 CS474 (Norton) Review for Exam 1 CS474 (Norton) What is a Database? Properties of a database Stores data to derive information Data in a database is, in general: Integrated Shared Persistent Uses of Databases The Integrated

More information

Sankalchand Patel College of Engineering, Visnagar B.E. Semester III (CE/IT) Database Management System Question Bank / Assignment

Sankalchand Patel College of Engineering, Visnagar B.E. Semester III (CE/IT) Database Management System Question Bank / Assignment Sankalchand Patel College of Engineering, Visnagar B.E. Semester III (CE/IT) Database Management System Question Bank / Assignment Introductory concepts of DBMS 1. Explain detailed 3-level architecture

More information

Elements of the E-R Model

Elements of the E-R Model Chapter 3: The Entity Relationship Model Agenda Basic Concepts of the E-R model (Entities, Attributes, Relationships) Basic Notations of the E-R model ER Model 1 Elements of the E-R Model E-R model was

More information

LECTURE 6: GUIDELINES FOR GOOD RELATIONAL DESIGN MAPPING ERD TO RELATIONS

LECTURE 6: GUIDELINES FOR GOOD RELATIONAL DESIGN MAPPING ERD TO RELATIONS LECTURE 6: GUIDELINES FOR GOOD RELATIONAL DESIGN MAPPING ERD TO RELATIONS Ref. Chapter 16 Logical Database Design Methodology for the Relational Model 1 Objectives 2 How to derive a set of relations from

More information

ER to Relational Model. Professor Jessica Lin

ER to Relational Model. Professor Jessica Lin ER to Relational Model Professor Jessica Lin 1 Reduction to Relation Schemas Entity sets and relationship sets can be expressed uniformly as relation schemas that represent the contents of the database.

More information

ADVANCED QUERY AND VIEWS

ADVANCED QUERY AND VIEWS ADVANCED QUERY AND VIEWS EGCO321 DATABASE SYSTEMS KANAT POOLSAWASD DEPARTMENT OF COMPUTER ENGINEERING MAHIDOL UNIVERSITY TYPE OF SUBQUERIES There are two main types of subqueries - nested and correlated.

More information

The DBMS accepts requests for data from the application program and instructs the operating system to transfer the appropriate data.

The DBMS accepts requests for data from the application program and instructs the operating system to transfer the appropriate data. Managing Data Data storage tool must provide the following features: Data definition (data structuring) Data entry (to add new data) Data editing (to change existing data) Querying (a means of extracting

More information

8) A top-to-bottom relationship among the items in a database is established by a

8) A top-to-bottom relationship among the items in a database is established by a MULTIPLE CHOICE QUESTIONS IN DBMS (unit-1 to unit-4) 1) ER model is used in phase a) conceptual database b) schema refinement c) physical refinement d) applications and security 2) The ER model is relevant

More information

Standard Query Language. SQL: Data Definition Transparencies

Standard Query Language. SQL: Data Definition Transparencies Standard Query Language SQL: Data Definition Transparencies Chapter 6 - Objectives Data types supported by SQL standard. Purpose of integrity enhancement feature of SQL. How to define integrity constraints

More information

COSC344 Database Theory and Applications. σ a= c (P) S. Lecture 4 Relational algebra. π A, P X Q. COSC344 Lecture 4 1

COSC344 Database Theory and Applications. σ a= c (P) S. Lecture 4 Relational algebra. π A, P X Q. COSC344 Lecture 4 1 COSC344 Database Theory and Applications σ a= c (P) S π A, C (H) P P X Q Lecture 4 Relational algebra COSC344 Lecture 4 1 Overview Last Lecture Relational Model This Lecture ER to Relational mapping Relational

More information

CS317 File and Database Systems

CS317 File and Database Systems CS317 File and Database Systems Lecture 3 Relational Calculus and Algebra Part-2 September 7, 2018 Sam Siewert RDBMS Fundamental Theory http://dilbert.com/strips/comic/2008-05-07/ Relational Algebra and

More information

Relational Model. CS 377: Database Systems

Relational Model. CS 377: Database Systems Relational Model CS 377: Database Systems ER Model: Recap Recap: Conceptual Models A high-level description of the database Sufficiently precise that technical people can understand it But, not so precise

More information

COSC344 Database Theory and Applications. Lecture 5 SQL - Data Definition Language. COSC344 Lecture 5 1

COSC344 Database Theory and Applications. Lecture 5 SQL - Data Definition Language. COSC344 Lecture 5 1 COSC344 Database Theory and Applications Lecture 5 SQL - Data Definition Language COSC344 Lecture 5 1 Overview Last Lecture Relational algebra This Lecture Relational algebra (continued) SQL - DDL CREATE

More information

What happens. 376a. Database Design. Execution strategy. Query conversion. Next. Two types of techniques

What happens. 376a. Database Design. Execution strategy. Query conversion. Next. Two types of techniques 376a. Database Design Dept. of Computer Science Vassar College http://www.cs.vassar.edu/~cs376 Class 16 Query optimization What happens Database is given a query Query is scanned - scanner creates a list

More information

Physical Database Design

Physical Database Design Physical Database Design January 2007 Yunmook Nah Department of Electronics and Computer Engineering Dankook University Physical Database Design Methodology - for Relational Databases - Chapter 17 Connolly

More information

Multiple-Choice. 1. Which of the following is equivalent to a table? (3 pts.) a. record b. relation c. relationship d. constraint e.

Multiple-Choice. 1. Which of the following is equivalent to a table? (3 pts.) a. record b. relation c. relationship d. constraint e. Database Design, CSCI 340, Spring 2016 2 nd Exam, April 1 Multiple-Choice 1. Which of the following is equivalent to a table? (3 pts.) a. record b. relation c. relationship d. constraint e. schema 2. Which

More information

Database Systems ER Model. A.R. Hurson 323 CS Building

Database Systems ER Model. A.R. Hurson 323 CS Building ER Model A.R. Hurson 323 CS Building Database Design Data model is a group of concepts that helps to specify the structure of a database and a set of associated operations allowing data retrieval and data

More information

DATABASE MANAGEMENT SYSTEM SHORT QUESTIONS. QUESTION 1: What is database?

DATABASE MANAGEMENT SYSTEM SHORT QUESTIONS. QUESTION 1: What is database? DATABASE MANAGEMENT SYSTEM SHORT QUESTIONS Complete book short Answer Question.. QUESTION 1: What is database? A database is a logically coherent collection of data with some inherent meaning, representing

More information

CS317 File and Database Systems

CS317 File and Database Systems CS317 File and Database Systems http://dilbert.com/strips/comic/2010-08-24/ Lecture 8 Introduction to Normalization October 17, 2017 Sam Siewert Exam #1 Questions? Reminders Working on Grading Ex #3 -

More information

Top 88 Question Asked in Part I of MIS 150 EXAM #1 (Chapter 1-4, Appendix C) Exams questions gathered from old tests dating back to Fall 2000

Top 88 Question Asked in Part I of MIS 150 EXAM #1 (Chapter 1-4, Appendix C) Exams questions gathered from old tests dating back to Fall 2000 Top 88 Question Asked in Part I of MIS 150 EXAM #1 (Chapter 1-4, Appendix C) Exams questions gathered from old tests dating back to Fall 2000 1. Name one data model that emphasizes the concept of reusable

More information

Lecture 07. Spring 2018 Borough of Manhattan Community College

Lecture 07. Spring 2018 Borough of Manhattan Community College Lecture 07 Spring 2018 Borough of Manhattan Community College 1 SQL Identifiers SQL identifiers are used to identify objects in the database, such as table names, view names, and columns. The ISO standard

More information

Chapter 6. SQL Data Manipulation

Chapter 6. SQL Data Manipulation Chapter 6 SQL Data Manipulation Pearson Education 2014 Chapter 6 - Objectives Purpose and importance of SQL. How to retrieve data from database using SELECT and: Use compound WHERE conditions. Sort query

More information

The University of British Columbia

The University of British Columbia The University of British Columbia Computer Science 304 Midterm Examination February 23, 2005 Time: 50 minutes Total marks: 50 Instructor: George Tsiknis Name (PRINT) (Last) (First) Signature This examination

More information

Class Information. Textbooks. Grading. Final Project. Grading. CS 440: Database Management Systems. Instructor:

Class Information. Textbooks. Grading. Final Project. Grading. CS 440: Database Management Systems. Instructor: CS 440: Database Management Systems Class Information Instructor: Eugene Zhang (zhange@eecs.oregonstate.edu) 2 KEC Office hour: MWF 4:00 5:00 Class web site: http://classes.engr.oregonstate.edu/eecs/winter200/cs440/

More information

VU Mobile Powered by S NO Group All Rights Reserved S NO Group 2013

VU Mobile Powered by S NO Group All Rights Reserved S NO Group 2013 1 CS403 Final Term Solved MCQs & Papers Mega File (Latest All in One) Question # 1 of 10 ( Start time: 09:32:20 PM ) Total Marks: 1 Each table must have a key. primary (Correct) secondary logical foreign

More information

COSC344 Database Theory and Applications. σ a= c (P) Lecture 3 The Relational Data. Model. π A, COSC344 Lecture 3 1

COSC344 Database Theory and Applications. σ a= c (P) Lecture 3 The Relational Data. Model. π A, COSC344 Lecture 3 1 COSC344 Database Theory and Applications σ a= c (P) S P Lecture 3 The Relational Data π A, C (H) Model COSC344 Lecture 3 1 Overview Last Lecture Database design ER modelling This Lecture Relational model

More information

Data and Knowledge Management Dr. Rick Jerz

Data and Knowledge Management Dr. Rick Jerz Data and Knowledge Management Dr. Rick Jerz 1 Goals Define big data and discuss its basic characteristics Understand ways to store information Understand the value of a Database Management System Explain

More information

Introduction to Database Management Systems

Introduction to Database Management Systems Relational Data Model Relational Data Model 1 o Relations o Attributes o Tuples o Relations o Primary Keys o Objectives o Comparison to other models o Components o Relation Properties o Kinds of Relations

More information

Conceptual Database Design

Conceptual Database Design Conceptual Database Design Fall 2009 Yunmook Nah Department of Electronics and Computer Engineering Dankook University Conceptual Database Design Methodology Chapter 15, Connolly & Begg Steps to Build

More information

Relational Databases Overview

Relational Databases Overview Relational Databases Overview Full Description of the Relational Model Mapping ER diagrams to the Relational Model Integrity Constraints and the Relational Model Querying A Relational Database The Relational

More information

DC62 Database management system JUNE 2013

DC62 Database management system JUNE 2013 Q2 (a) Explain the differences between conceptual & external schema. Ans2 a. Page Number 24 of textbook. Q2 (b) Describe the four components of a database system. A database system is composed of four

More information

2011 DATABASE MANAGEMENT SYSTEM

2011 DATABASE MANAGEMENT SYSTEM Name :. Roll No. :..... Invigilator s Signature :.. CS/B.TECH(IT)/SEM-6/IT-604/2011 2011 DATABASE MANAGEMENT SYSTEM Time Allotted : 3 Hours Full Marks : 70 The figures in the margin indicate full marks.

More information

DB Creation with SQL DDL

DB Creation with SQL DDL DB Creation with SQL DDL Outline SQL Concepts Data Types Schema/Table/View Creation Transactions and Access Control Objectives of SQL Ideally, database language should allow user to: create the database

More information

Data and Knowledge Management. Goals. Big Data. Dr. Rick Jerz

Data and Knowledge Management. Goals. Big Data. Dr. Rick Jerz Data and Knowledge Management Dr. Rick Jerz 1 Goals Define big data and discuss its basic characteristics Understand ways to store information Understand the value of a Database Management System Explain

More information

Chapter 1 SQL and Data

Chapter 1 SQL and Data Chapter 1 SQL and Data What is SQL? Structured Query Language An industry-standard language used to access & manipulate data stored in a relational database E. F. Codd, 1970 s IBM 2 What is Oracle? A relational

More information

Transforming ER to Relational Schema

Transforming ER to Relational Schema Transforming ER to Relational Schema Transformation of ER Diagrams to Relational Schema ER Diagrams Entities (Strong, Weak) Relationships Attributes (Multivalued, Derived,..) Generalization Relational

More information

Data about data is database Select correct option: True False Partially True None of the Above

Data about data is database Select correct option: True False Partially True None of the Above Within a table, each primary key value. is a minimal super key is always the first field in each table must be numeric must be unique Foreign Key is A field in a table that matches a key field in another

More information

Chapter 1: Introduction

Chapter 1: Introduction Chapter 1: Introduction Chapter 2: Intro. To the Relational Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Database Management System (DBMS) DBMS is Collection of

More information

Database Systems CSci 4380 Final Exam May 19, 2016 SOLUTIONS

Database Systems CSci 4380 Final Exam May 19, 2016 SOLUTIONS Database Systems CSci 4380 Final Exam May 19, 2016 SOLUTIONS Question 1 (10 points). You are given the schedule below. List all conflicts. Draw the conflict graph. Discuss whether it is serializable or

More information

Comp 5311 Database Management Systems. 2. Relational Model and Algebra

Comp 5311 Database Management Systems. 2. Relational Model and Algebra Comp 5311 Database Management Systems 2. Relational Model and Algebra 1 Basic Concepts of the Relational Model Entities and relationships of the E-R model are stored in tables also called relations (not

More information

CS 377 Database Systems

CS 377 Database Systems CS 377 Database Systems Relational Algebra and Calculus Li Xiong Department of Mathematics and Computer Science Emory University 1 ER Diagram of Company Database 2 3 4 5 Relational Algebra and Relational

More information

Data Models. CS552- Chapter Three

Data Models. CS552- Chapter Three Data Models CS552- Chapter Three 1 Chapter Objectives What are the available options and techniques in modeling organizational data before implementation? Datamodels Relational Data model Relational Integrity

More information