How do different schema definition languages support this architecture? Page 2 of ... 1) Databases that run on your desk
FP304 DATABASE SYSTEM
DECEMBER 2012
LAB 1 : FUNDAMENTALS OF DATABASE MANAGEMENT SYSTEM LEARNING OUTCOMES This lab sheets comprises of activities 1A until 1D
By the end of this lab session, you must be able to:
Explain and identify common database management system Describe the three-schema architecture of DBMS Describe the client-server architecture of DBMS Identify the categories of DBMS Describe the benefits of Desktop database and Server database Select an appropriate DBMS suitable for a given business requirements Identify the contribution of database technology to society
Activity 1A Databases and DBMS are an essential component of life in modern society: most of used counter several activities every day that involve some interaction with a database. For example, if we go to the bank to deposit or withdraw funds, if we make a hotel or airline reservation, if we access a computerized library catalog to search for a bibliographic item, or if we purchase something online such as a book, toy, or computer chances are that our activities will involve someone or some computer program accessing a database. Even purchasing items at a supermarket often automatically updates the database that holds the inventory of grocery items. 1. Why would you choose a DBMS instead of simply storing data in operating system files? 2. Name few of database names that you know. 3. When would it make sense not to use a DBMS?
FP304 DATABASE SYSTEM
DECEMBER 2012
Activity 1B
Diagram 1 1. Describe the three level-schema architecture. 2. Why do we need mappings between schema levels? 3. How do different schema definition languages support this architecture?
FP304 DATABASE SYSTEM
DECEMBER 2012
Activity 1C There are several different types of databases, but to simplify our discussion, we are going to suggest that “relational” databases are the primary type of database used in today’s organizations. Relational databases may be broken into two categories: 1) Databases that run on your desktop computer, and 2) Databases that are running on a separate server, usually in a different location from your desktop computer. We will call the first category “desktop databases” and the second category will be called “client server systems” (Server database). Client server systems are more complicated because there is a program running on your computer (“client”) that connects to the database itself on the server (“server”), and this requires a network. The explosive development and availability of the internet has provided this network to nearly every organization, and client server database systems are now widely available. 1. By reading the text above, discuss the differences between Desktop database and Server database.
Activity 1D In a group of 4, identify the contribution of database technology to the society. You may present your answer by stating sample of real situation(s) that happen in Malaysia currently.
FP304 DATABASE SYSTEM
DECEMBER 2012
EXERCISES (CLO1) 1. Discuss the main characteristics of the database approach and how it differs from traditional file systems.
(4m)
2. Provide and explain2 examples of systems in which it may make sense to use traditional file processing instead of a database approach. 3. Define client/server architecture.
