CS3402 Database Systems Tutorials CS3402 Tutorial 1 (Introduction and ER Model): 1. Below are some sample data stored in an Excel file. Identify entity, entity set, attribute, relationship, relationship set in this application. 2. Construct an ER diagram for a car insurance company with a set of customers, each of whom owns a number of […]
CS3402 Database Systems Tutorials CS3402 Tutorial 2: 1. Translate the ER diagram below to relational tables in the following steps. (a) Map strong entity type into relation (b) Map weak entity + identifying relationship type into relation (c) Map binary 1:1 relationship types into attributes (d) Map binary 1:N Relationship types into attributes (e) Map
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CS3402 Database Systems Tutorials CS3402 Tutorial 2: 1. Translate the ER diagram below to relational tables in the following steps. (a) Map strong entity type into relation (b) Map weak entity + identifying relationship type into relation (c) Map binary 1:1 relationship types into attributes (d) Map binary 1:N Relationship types into attributes (e) Map
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CS3402 Database Systems Tutorials CS3402 Tutorial 5: 1. We are going to design a database for the CS3402 course to keep track the information about students who are taking this course. In this course, each student can be assigned to one optional group discussion section with more than one participant. Each group discussion section
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CS3402 Database Systems Teaching Staff’s Information Lecturers: Dr. LIAO Jing (week1-6) Dr. CHEUNG Man Hon Michael (week 8-13) Email: jingliao@cityu.edu.hk Phone: 3442-8619 Office: YEUNG-G6429 Teaching Assistants: Email:mhcheung@cityu.edu.hk Phone: 3442-7324 Office: YEUNG-Y6412 Mr. MENG Xiangyi xianmeng5-c@my.cityu.edu.hk Ms. HUANG Jialu Ms. YE Shuquan Mr. WAN Ziyu Mr. ZHANG Jingbo
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CS3402 Database Systems: ER , Relational Data Model CS3402 ER Model Concepts Revisited Entity: an object represented in the database For example, an employee ‘John Smith’ Attribute: properties used to describe an entity/relationship For example, an EMPLOYEE entity may have Name, ID, Address, EMPLOYEE Sex, BirthDate ID Sex Name BirthDate Relationship: an
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CS3402 Database Systems Tutorials CS3402 Tutorial 5: 1. We are going to design a database for the CS3402 course to keep track the information about students who are taking this course. In this course, each student can be assigned to one optional group discussion section with more than one participant. Each group discussion section
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CS3402 1 CS3402 – Chapter 3 Integrity Constraints Database Modelling and Implementation Ideas/requirements E/R design Relational schema Relational database CS3402 2 Summary of ER-Diagram Notation Symbol Meaning ENTITY TYPE WEAK ENTITY TYPE RELATIONSHIP TYPE IDENTIFYING RELATIONSHIP TYPE ATTRIBUTE (Primary) KEY ATTRIBUTE MULTIVALUED ATTRIBUTE COMPOSITE ATTRIBUTE DERIVED ATTRIBUTE TOTAL PARTICIPATION OF E2 IN R CARDINALITY RATIO
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2/14/20 1 Conceptual Database Design 1. Conceptual Database Design Appl E-R Relational DB 2/14/20 2 Database Design Entity-Relationship Model • The Entity-Relationship (ER) model is a high- level conceptual data model (Chen in 1966). • ER is used mainly as a design tool. 2/14/20 3 Entity-Relationship Model(cont) • Entity type: Group of object with the
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Question 1 Exercise 1 The CBD and South East Light Rail is a new light rail network for Sydney, currently under construction. The 12km route will feature 19 stops, extending from Circular Quay along George Street to Central Station, through Surry Hills to Moore Park, then to Kensington and Kingsford via Anzac Parade and Randwick
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