Entity PrimaryKey Attribute relationship Cardinality: zero to many Cardinality: one and only one Cardinality: one to many Explanation Entity Relationship.

Slides:



Advertisements
Similar presentations
Banking Business Scenario
Advertisements

ER Model For a college DB
Relational Database Modeling II We dont live in a world of reality, we live in a world of perceptions. J. Gerald Simmons.
Computer Science 101 Web Access to Databases ER and Relational Models.
GCSE Computing#BristolMet Session Objectives# 21 MUST describe methods of validating data as it is input. SHOULD explain the use of key fields to connect.
ISMT221 Information Systems Analysis and Design Entity-Relationship Diagram Lab 4 Tony Tam.
1 Class Agenda – 09/20/2011  Answer questions about exam  Evaluate database design homework  Review database design homework for syntax and logic 
WELL-DESIGNED DATABASES Process faster Easy to develop and maintain Easy to read and write code.
Chapter 2. The Relational Model (cont.) IST2101. Review: Functional Dependency A relationship between attributes: some attribute(s) determine the value.
Systems Analysis and Design in a Changing World, 6th Edition
The (min,max) notation (1,1) (0,1) (1,N) (1,1). SUMMARY OF ER-DIAGRAM NOTATION FOR ER SCHEMAS Meaning ENTITY TYPE WEAK ENTITY TYPE RELATIONSHIP TYPE IDENTIFYING.
1 Chapter 4 Enhanced E-R Model. 2 Supertypes and Subtypes Subtype: A subgrouping of the entities in an entity type which has attributes that are distinct.
Amity School of Engineering & Technology E-R Diagram for a University Enterprise.
Entity Relationship Model Chapter 6. Basic Elements of E-R Model Entity Object of the real world that stores data. Eg. Customer, State, Project, Supplier,
COURSE REGISTRATION SYSTEM Case study IST2101. Case Study: Course Registration (1) IST2102 You are helping Penn State create a course registration system.
Review Session What is data, what is information, and give a real world example to differentiate these two concepts.
Database Design Concepts
Conversion from ER diagram to relational model
The REA Model. The REA model provides structure for developing an accounting database It helps to identify It helps to The REA Model.
Q1: What is DBMS and explain its architecture. Q2: Explain Data Independence in detail. Q3: What is database user and explain the types of database user.
CS 3630 Database Design and Implementation. 2 Mathematical Relation A mathematical relation is a subset of a Cartesian Product. A1  A2  A3  …  An.
R ELATIONAL D ATA M ODEL Joe Meehean 1. R ELATIONAL D ATA M ODEL Data stored as a set of relations really just tables Tables related to one another through.
PLUG IT IN 3 Fundamentals of Relational Database Operations.
©Silberschatz, Korth and Sudarshan1Database System Concepts - 6 th Edition E-R Diagram for a University Enterprise.
1 Mathematical Relation A mathematical relation is a subset of a Cartesian Product. A1  A2  A3  …  An = {(x1, x2, x3, …, xn): xi  Ai} R  A1  A2.
What we’ve learnt Doc 5.69 Doc 5.70 Section 1-3. A simple database Related objects Tables hold the data Forms, reports, queries to access the data.
ITEC 3220A Using and Designing Database Systems Instructor: Gordon Turpin Course Website: Office: CSEB3020.
Database System Concepts, 6 th Ed. ©Silberschatz, Korth and Sudarshan See for conditions on re-usewww.db-book.com Chapter 7: Entity-Relationship.
MIS 3053 Database Design & Applications The University of Tulsa Professor: Akhilesh Bajaj InClass ER Examples.
4 1 Database Systems: Design, Implementation, & Management, 7 th Edition, Rob & Coronel Relationship Degree Indicates number of entities or participants.
The Hong Kong University of Science and Technology COMP3311 Spring 2013 Tutorial 1 ER Diagrams.
Access Review. Access Access is a database application A database is a collection of records and files organized for a particular purpose Access supports.
An Entity Relationship (ER) Diagram is a graphic that shows the interrelationship between entities in a database.
Rebecca McCready Faculty of Medical Sciences Newcastle University Lecture 2 – Relationships and Lookup fields.
Jozef Kuper.  Describe a Database  Entities  Atributes  Relationships.
COMP231 Tutorial 1 ER Model and ER to Relational Schema.
ENTITY RELATIONSHIP DIAGRAM ENTITY RELATIONSHIP DIAGRAM IS A SPECIALIZED GRAPHIC THAT ILLUSTRATES THE INTERRELATIONSHIPS BETWEEN ENTITIES IN A DATABASE.
Relational Theory and Design
Order Database – ER Diagram Prepared by Megan Foster Fall Semester 2014.
Chapter 2. The Relational Model (cont.) IST2101. Review: Determinant vs. Candidate Key IST2102 DeterminantsCandidate Key (StudentID, CourseID) StudentID.
Exam 1 Review: ERDs, Schemas, SQL Out Describe Elements of an ERD Create Schema from ERD Notes: Associative Entities.
Database System Concepts, 6 th Ed. ©Silberschatz, Korth and Sudarshan See for conditions on re-usewww.db-book.com Chapter 7: Entity-Relationship.
Database Design I (In-Class Exercise Answer) IST 210: Organization of Data IST2101.
MIS 3053 Database Design & Applications The University of Tulsa Professor: Akhilesh Bajaj ER Model Lecture 2 © Akhilesh Bajaj, 2000, 2002, 2003, 2004,
1. Explain the DBMS with its Components and Describe the various functions of DBMS? 2. Define the term DBA. Explain the various Roles of Database Administrator?
Howard Paul. Sequential Access Index Files and Data File Random Access.
Chapter 2: Entity-Relationship Model. 3.2 Chapter 2: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram Design Issues Weak Entity.
©Silberschatz, Korth and Sudarshan7.1Database System Concepts - 6 th Edition Chapter 7: Entity-Relationship Model.
Database System Concepts, 6 th Ed. ©Silberschatz, Korth and Sudarshan See for conditions on re-usewww.db-book.com Chapter 7: Entity-Relationship.
CS 3630 Database Design and Implementation. 2 Mathematical Relation A mathematical relation is a subset of a Cartesian Product. A1  A2  A3  …  An.
Conversion from ER diagram to relational model 1 ER is a visual model The relational model is a matemathical model.
Hoi Le. Why database? Spreadsheet is not good to: Store very large information Efficiently update data Use in multi-user mode Hoi Le2.
MIS 3053 Database Design & Applications The University of Tulsa Professor: Akhilesh Bajaj ER Model Lecture 3 © Akhilesh Bajaj, 2000, 2002, All Rights.
Information System Design “Student Registration System Example”
ENTITY RELATIONSHIP DIAGRAM. Objectives Define terms related to entity relationship modeling, including entity, entity instances, attribute, relationship.
DATA MODELING AND ENTITY-RELATIONSHIP MODEL II IST 210: Organization of Data IST210 1.
Problems 7/27/02. 3, p5 Student Course Student-Course Stu-ID Course-ID Grade.
Week 03 – ER Diagram INFOSYS 222.
Entity-Relationship Modeling
Chapter 5 STUDENT-COURSE
Order Database – ER Diagram
Foreign key (FK) is defined as follows:
Example A university registrar’s office maintains data about the following entities: (a) courses, including number, title, credits, syllabus, and prerequisites;
Dimensional Model for the Course Offerings Database
Weak Entity Sets An entity set that does not have a primary key is referred to as a weak entity set. The existence of a weak entity set depends on the.
Chengyu Sun California State University, Los Angeles
1.(5) Describe the working process with a database system.
Database Management System
Database 2.
Database Management System
Presentation transcript:

Entity PrimaryKey Attribute relationship Cardinality: zero to many Cardinality: one and only one Cardinality: one to many Explanation Entity Relationship Diagrams

Faculty Courses Sections Students CourseID SectionID Year Semester FacultyID StudentID Grade CreditHour teaches Is offered takes Days StartTime EndTime Entity Relationship Diagram of Faculty/Courses/Students

Entity Relationship Diagram As a Schema in a Relational Database Explanation PrimaryKey Foreign Key ForeignKey1 ForeignKey2 (combined as primary key)

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.