Database Environment Paper DBM-380 November 18‚ 2012 Introduction A database defines a structure for storing information and it collects information that is organized in such a way that a computer program can quickly select desired pieces of data. A database can also be thought of as an electronic filing system. Data and information are extracted from a database by creating a query and then submitting it to the query database management system (DBMS) and it is posed in a language that
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SOFTWARE REQUIREMENTS SPECIFICATION(SRS) FOR AIRLINE DATABASE Table of Contents 1. Introduction 1.1 Purpose 1.2 Document Conventions 1.3 Intended Audience and Reading Suggestions 1.4 Project Scope 1.5 References 2. Overall Description 2.1 Product Perspective 2.2 Product Features 2.3 User Classes and Characteristics 2.4 Operating Environment 2.5 Design and Implementation Constraints 2.6 Assumptions and Dependencies 3. System Features 4. External Interface Requirements 4.1 User Interfaces 4.2 Hardware
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Relational Databases Lee Rudd Abstract Data for our programs are stored in various formats. The most commonly used format is in the form of a database since databases are not dependent on a single program or hardware platform. These databases are stored in five structures of hierarchical‚ network‚ relational‚ multidimensional‚ and object-oriented. Hierarchical structure organizes data in a one to many relationship. The network goes of the hierarchical structure by organizing data in
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DISTRIBUTED DATABASE MANAGEMENT SYSTEM A distributed Database Management System (DDBMS) is a database in which storage devices are not all attached to a common processing unit such as the CPU. It may be stored in multiple computers‚ located in the same physical location; or may be dispersed over a network of interconnected computers. Unlike parallel systems‚ in which the processors are tightly coupled and constitute a single database system‚ a distributed database system consists of loosely coupled
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The hardest part about this assignment is finding the center line. The center line is always X-bar-bar. (An x with two bars above it). It’s the mean of all the sample means. I’ve attached an Excel spreadsheet showing how to calculate X-bar-bar. First‚ you find the average of each sampe. There were four in this case. The average is at the bottom. Then you take those four numbers and find the average for those. I rounded up to 5.1 to make it easier to graph. So X-bar-bar = 5.1. Once you X-bar-bar
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box the program will display and then just press the calculate button. When you open the excel document‚ first of all you need to click the button that says “PROCEED”‚ then you will have a sheet with two buttons and a reference box with tips and information for the program. If you click on the button “Welcome Sheet” the program will just return to the main page‚ the one you see when you open the excel document. The other option is to continue the program and click on the button “Input Data”
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------------------------------------------------- Excel Assignment #1 Exercise 1: Student Grade Book (expected time – less than 45 minutes) Please download the spreadsheet Excel Assignment 1.xlsx from Blackboard. Click on worksheet E1 (you may be in Worksheet E1 by default). This spreadsheet keeps track of students’ grades. There are two exams – Exams 1 and Exam 2. Please do the following: (a) Find the total weighted score for the semester based on Exam 1 and Exam 2 and their respective weights
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SOFTWARE REQUIREMENTS SPECIFICATION (SRS) FOR Student and Unit Management System (SUMS) – Registration Module Version 1.0 Prepared by: YEUNG Kam Fung (Ivan) Prepared for: Jim Briggs‚ University of Portsmouth DOCUMENT CHANGE HISTORY |Version Number |Date |Description | |1.1 |8th December 2005 |Jim made some formatting and content |
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ISM 6215 - Business Database Systems I Fall 2013 Home Work – 1 (Marks 100) Question 1 - Contrast the following terms. Give one example of each 1. Degree versus cardinality of relationship 2. Required versus optional attributes 3. Data dependence versus data independence 4. Structured versus unstructured data (4*2.5 =10 marks) Answer 1 - Degree; cardinality. The degree (of a relationship) is the number of entity types that participate in that relationship‚ while cardinality is a
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....................................................................3 1.2 Scope of the database ....................................................................................................................................3 2 Entity-Relationship Diagram ..............................................................................................................................4 3 Relational Database Schema ................................................................................
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