PRACTICE Activity 2: Unit 3 Assignment 1: Unit 3 True/False Questions 1) The logical design is independent of any database management system. Answer: True 2) The physical design is the logical design adapted to the constraints and features of the database management system. Answer: True 3) You should always try to create cross relationships between parent and tables. Answer: False 4) Naming conventions help support clarity and consistency in database design. Answer: True 5) One to one relationships
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institutions. A special strength of Keystone lies in its ability to help prepare for and implement energy sector projects both with regards to conventional and nonconventional energy sources. Keystone is also particularly strong in the areas of financial modeling and conducting legal and technical due diligence. These strengths are applicable in a wide variety of fields and we are constantly branching out to new areas to expand our product offering. Keystone has a global network of expert consultants across
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Date: TO WHOM SO EVER IT MAY CONCERN He was employed in the said position from dates of dd/mm/yyyy and dd/mm/yyyy. He had worked 40 hours per week and his annual salary was xxxx per annum. Besides salary, he also had other benefits like performance bonus, house rent allowances, transport allowances and medical insurance. His Responsibilities were as follows * Database Analysis and Design: Enforcement of database standards; working with Development
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Chapter 1 1. What is the difference between Data and Information? a. Data: raw facts that describe the characteristics of an event that, in isolation, have little meaning b. Information: data organized in a meaningful way to be useful to the user 2. What makes Information useful? c. Data is often processed (aggregated, sorted, etc.) and then combined with the appropriate context d. Decision makers typically require useful information to make decisions e
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1. What is an entity super type, and why is it used? It is an entity with 1 or more subtypes. It contains common characteristics. It is used to take advantage of inheritance, constraints, discriminators, and reduce the number of nulls. 2. What kinds of data would you store in an entity subtype? Entity subtypes contain more unique characteristics. A subtype will contain that data that is specific to the entity. Ex. A super type entity named Student contains a field for degrees studying but
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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 some existing resources including: •
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Part 1: Question and Answer Question 1: Difference between Indexed Table and Indexed View.. Indexes on table are generally always used. You will have at least one unique index and one of the indexes will be clustered. Indexes on views are generally only applied as an optimization technique. Indexes on the view can improve performance using the views. Question 2: Clustered VS non-clustered index Question 3: Explain HIP table A: Heap table is a table that does not have any Clustered Index. Question
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University of Phoenix Material Database Environment, Development Process, and Staffing Tables Part I Database Environment Table Describe each component of the database environment, and provide a common vendor-supplied example or an example of how this component relates to the rest of the database environment. |Components |Description |Example | |Database Management |The Computer Software application
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Data - raw facts about things and events Information - transformed data that has value for decision making 1. Persistent - data that resides on stable storage such as a magnetic disk (does not have to be forever - can be deleted or archived when no longer needed) 2. Shared - multiple uses and multiple users 3. Interrelated - data stored as separate units can be connected to provide a whole picture Database Management System - DBMS - A collection of components that supports: 1. creation
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Chapter 2 - Database System Concepts and Architecture Data Models, Schemas and Instances A characteristic of the database approach is that it provides a level of data abstraction, by hiding details of data storage that are not needed by most users. A data model is a collection of concepts that can be used to describe the structure of a database. The model provides the necessary means to achieve the abstraction. The structure of a database is characterized by data types, relationships
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