CS 2203 Unit 1 – 8 Self Quiz Review Questions The main purpose of the information model is to inform software developers and provide protocol-specific constructs. Select one: True False Question 2 Which term describes each two-dimensional table or file in the relational model? Select one: a. Database b. Relational Database c. Data Warehouse d. None of the Above Question 3 If a relation has more than one candidate key the one chosen to represent the relation is called the:
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Assignment 3: Business Intelligence and Data Warehouses Kevin Sloley Professor Dammlash Gebre CIS-111 Intro to Related Database Management Systems Due March, 2016 Outline the main differences between the structure of a relational database optimized for online transactions versus a data warehouse optimized for processing and summarizing large amounts of data. The primary difference between your application database and a data warehouse is that while the former is designed (and optimized)
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Database Management System Basith Shaik Southern New Hampshire University September 7, 2015 Abstract The intent of this paper is to design and propose a database management system solution to Grandfield College for tracking software installed. I have analyzed the organizational issues and needs and developed conceptual, logical, and physical designs of DBMS solution. In order to implement the solution, substantial research had been done on best practices in design, available products, and
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A composite primary key occurs when you define more than one column as your primary key. A char string can be up to 8,000 characters long. By definition, a primary key must be unique and must have a value (which is not null). How can you prevent the accidental loss of an entire table? Referential integrity How many bytes does a single character take up if it is a varchar that supports English and most European languages? 1 byte How many bytes does the int data type take up? 4 bytes
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Server architecture for DBMSs * Distributed Databases * Data Warehouse LECTURE FOUR: Database Design Process * Logical Database Design Process * Physical Database Design * Object-Oriented Database Design LECTURE FIVE: CAT LECTURE SIX: Modeling Data * Entity Relationship ER Model * Normalization LECTURE SEVEN: Introduction to Structured Query Language LECTURE EIGHT: Structured Query Language LECTURE NINE: Forms, Reports and Applications LECTURE TEN: Database Integrity and Security
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DBMS vs. RDBMS • Relationship among tables is maintained in a RDBMS whereas this not the case DBMS as it is used to manage the database. • DBMS accepts the ‘flat file’ data that means there is no relation among different data whereas RDBMS does not accepts this type of design. • DBMS is used for simpler business applications whereas RDBMS is used for more complex applications. • Although the foreign key concept is supported by both DBMS and RDBMS but its only RDBMS that enforces the rules. •
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Example Case to 3NF Tables Purpose The COIS20025 textbook and assignments have numerous exercises that require you to take a given case and generate a data design for the case. The data design will typically consist of an ERD, 3NF table designs including keys (obviously) and sample data. The purpose of this document is to give an example of how to do this. It walks you through the process of completing this task. Preparation This document draws on "Developing Entity Relationship Diagrams (ERDs)"
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1. Identify the entities and their relationships. Then create an ERD for the reservations system. 2. Create 3NF table designs for the system. 3. For each of the entities identified, design tables and identify the possible candidate keys, the primary key, a probable foreign key, and potential secondary keys. 4. Use sample data to populate the fields for three records. Data items must include reservation number, Route Number, Date, Origin, Destinations, Departure Time, Arrival Time, Passenger
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Chapter 1 Database Systems Discussion Focus How often have your students heard that “you have only one chance to make a good first impression?” That’s why it’s so important to sell the importance of databases and the desirability of good database design during the first class session. Start by showing your students that they interact with databases on a daily basis. For example, how many of them have bought anything using a credit card during the past day, week, month, or year? None of
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and your peers need to know. OLAP (online analytical processing) Star schema What is OLAP (online analytical processing) Fact table OLAP (online analytical processing) is computer processing that enables a Big data analytics Data modeling Ad hoc analysis user to easily and selectively extract and view data from different points of view. For example, a user can request that data be analyzed to display a spreadsheet showing all of a company's beach ball products sold in Florida
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