Information System & Database Design

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Presentation transcript:

Information System & Database Design CS105

What is Information System Data raw facts Information Data that has been organized to help us answer question Information System Software that helps us organize and analyze data

Information System vs. Website Directory Tables (in most database system) Website Directory Hierarchy Structure (Tree) Class CS105 Computer Concept M-2-135 Students Student Henry UMS00977588 Dan UMS00877832 … class enroll student

Tables Fields / Attribute (each column) Records (each row) Key (unique identification) cno Data cname, cr Records (each row) 7 records Courses

Entity- Relationship (ER) Model Database Schema ER Modeling / Diagram (1) An instructor is advising one or more students Students - stno - name - addr - city - state - zip Instructors - empno - name - rank - roomno - telno advising

Entity- Relationship (ER) Model ER Modeling / Diagram (2) stno name name addr empno Students advising Instructors city state rank roomno zip telno

Example in Textbook: Movie Rental Entity Movie MovieId, Title, Genre, Rating Customer CustomerId, Name, Address, CreditCardNumber Relationship Rents CustomerId, MovieId, DataRented, DateDue

Course DB Entity Relationships Students Courses Instructors Advising Grades

What you need to do Find your partner(s) You should draw an ER diagram with 2 Tables for Entities 1 Table for Relationship All tables should contain at least 1 key and 3 data fields. You should have a short description Turn in the diagram with your signatures after class.