SR-ht-003 Documentation Entities and Attributes When writing application programs and designing databases the first step is traditionally to document program logic into what is known as flowcharts, object diagrams, and data models. Before this can be done you must first decide which technique you are going to use. The most popular form of data models is what’s known as entity-relationship model (ERD) which was designed and published for the first time ever by Peter Chan in 1976. The basic
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Huffman Trucking Company DBM/380 July 16, 2012 Gaya P. Agrawal Introduction During World War II it was imperative that the United States government find a way to transport products to and from different parts of the United States. Huffman Trucking Company was one of the first companies commissioned by the United States used to assist in this effort. Established in Cleveland Ohio K. Huffman started the company with one tractor-trailer and thanks to the help of the United States government
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Who needs a Database? Redundancy: It refers to storing the same data in more than one place in the database Primary Key: constraint uniquely identifies each record in a database table. Primary keys must contain unique values. A primary key column cannot contain NULL values. Each table should have a primary key, and each table can have only ONE primary key. SQL: is a standard language for accessing databases. Foreign Key: is a column or combination of columns that is used to establish and enforce
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ITCS215: Lesson Three Worksheet | Student Name: Instructions: This worksheet will assist you in completing your assignments for this week. Save this worksheet as lastname_Lesson3.docx and submit. You are required to complete all sections indicated by red brackets. You will replace the red brackets and text with the indicated material. For example, for the “Student Name” section above, a completed response would look like this: Student Name: When responding with text, please
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Chapter 3 and 4 and Relational Algebra Chapter 3: 1. Consider the relation (20 points): PERSON_2 (Name, Sibling, Shoe_Size, Hobby) Assume that the following functional dependencies exist: Name Sibling Name Shoe_Size Name Hobby a. Describe deletion, modification, and insertion anomalies for this relation. Consider the following relation: Name Sibling Shoe_Size Hobby Jones Fred E Model boats Jones Fred E Scuba Diving Jones Sally E Model boats Jones Sally E Scuba Diving
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Dealing with Missing Information in a Data Warehouse Today businesses are investing many resources in building data warehouses and data marts to obtain timely and actionable information that will give them better business insight. This will enable them to achieve, among other things, sustainable competitive advantage, increased revenues and a better bottom line. In the early '90s, data warehousing applications were either strategic or tactical in nature. Trending and detecting patterns was the
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Microsoft-Access Tutorial Soren Lauesen E-mail: slauesen@itu.dk Version 2.4b: July 2011 Contents 1. The hotel system................................................... 4 2. Creating a database ............................................. 6 2.1 Create a database in Access ............................. 6 2.2 Create more tables ......................................... 10 2.3 Create relationships ....................................... 12 2.4 Look-up fields, enumeration type ................
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the exercises that will follow you will create a simple database while you learn the basic features of Access. Later on, you will create a more complex database as you learn more advanced features in addition to some of the principles of database theory. In these exercises it is assumed that you are familiar with Windows use and have experience in using other applications such as Word or Excel. Note Most of what is taught in these exercises will work fine in most versions of Access up to Access
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Assignment 2: Database Design and Data Modeling Joesph Thomas 18 November 2014 IT525-01 Database Design and Data Modeling Professor: Jon McKeeby, DSc. Kaplan University Question 1. Definitions a. Business Rule: These are used to provide consistent control of the application’s data access by providing dependencies and relationships between system processes and the application. An example would be when you click print, the application automatically prints to the default printer set by
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Tasks | Team Member Responsibilities | Assessment | Grading Rubrics Objective The project for CIS336 is designed to touch all aspects of the fundamental concepts of database design and logical data modeling covered during the class. The project is team centered and each team will be responsible for designing, developing, and demonstrating the functionality of a database created based on a defined set of business specifications. At the end of the session
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