An entity-relationship model is one of the most challenging aspects of designing a database because you have to (1) understand the rules that govern how processes work and (2) be able to define and describe these rules in a picture. This section has provided you with the necessary tools to draw a basic ER model. Imagine the following scenario. You are designing a database for your local police department to keep track of traffic violations. The department has provided you with the following rules: • Each office can write multiple tickets. • Each ticket will list only one office. Each ticket will list only one driver. • Drivers can receive multiple tickets. STEP 3: Deliverable Using the tools described in this section, demonstrate that you understand the process of ER modeling by drawing and submitting an ER model for the scenario provided in Step 2.

An entity-relationship model is one of the most challenging aspects of designing a database because you have to (1) understand the rules that govern how processes work and (2) be able to define and describe these rules in a picture. This section has provided you with the necessary tools to draw a basic ER model. Imagine the following scenario. You are designing a database for your local police department to keep track of traffic violations. The department has provided you with the following rules: • Each office can write multiple tickets. • Each ticket will list only one office. Each ticket will list only one driver. • Drivers can receive multiple tickets. STEP 3: Deliverable Using the tools described in this section, demonstrate that you understand the process of ER modeling by drawing and submitting an ER model for the scenario provided in Step 2.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Dr. Jones, knowing that you are an intuitive database design student, has come to you with a possible database solution for his medical practice. He is interested in storing data related to his patients and the medications that they take. He specifically would like to keep track of the drug names, the drug price, the dosage each patient takes, and the dates that the medications were prescribed. He needs to be able to pull patient data quickly to make sure that each patient is taking the least medication to help their illness. Create business rules that might go with this scenario. Keep in mind that nouns (subjects) will become entities and their characteristics attributes. Verbs will translate into the relationships between entities. Create the ER diagram using Visio that would go with this scenario. Be sure to include entities, attributes, keys, and relationships using the crow’s feet notation
Create an ERD Diagram with all the relationships based of this: The city of California has just established its criminal justice/police department. You and your team have been assigned the task of creating a database system for the department. The database should be able to store and manage information about the department's workers, their roles, medical records, and incidents that occurred under the department's jurisdiction. This includes information about the investigator(s), the offender(s), the evidence, and the judicial proceedings, such as the trial details, the presiding judge, and the lawyers. The database should also be able to support the recording of punishments, such as sentencing time, fines, and warnings.
You must create an ER model for Upwork before forward engineering the database in MySQL. A database design project typically begins with requirements analysis to identify the business rules, entities, and relationships to form an ERD, which is then converted into a database. Assumptions: - A client/freelancer can sign up and create an account via email. - A freelancer cannot be a client. - Clients can leave feedback on the freelancers. - The system should keep track of all bids for each project. - The total bid amount can be calculated by assuming an 8-hour workday. [(freelance hourly rate * total number of days * 8) = Bid Amount] Other functionality not mentioned in the assumptions section is out of scope. Hint: How to get started: - Writing down your design before implementing it in MySQL will help you better understand the relationships. - Examine the screenshots provided to learn how the website works. - Determine which entities are required and which may be required. - Record…
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NOTE: please explain better . Question 4 You have just been hired as a consultant for a big Health Care provider. Impressed by your background in databases, they want you to completely redesign their database system. Talking with the people at the HC provider, you get the following information (be very careful on some of these attributes, and apply everything you have learned to this point: - The database contains information about patients, hospitals and doctors. - Each patient has an ID, first name, last name, address and age. A patient is uniquely identified by his or her ID. - Each hospital has an id, name and budget. The id uniquely identifies a hospital. - Each doctor an id, a full name, email address and a favorite movie. The id uniquely identifies a doctor. - Each patient can be treated at many hospitals, a hospital can treat many patients. - Each doctor can work at only one hospital. A hospital can have many doctors. 4.1) Draw the…
The entity relationship diagram below models the components of a database belonging to the South African Film Writers' Association. The database allows SAFWA to keep track of movies filmed in South Africa, developed by domestic and international studios. The MS Access database diagram below shows the tables created for a travel agent company called TravelSpace. They implemented their database to keep track of their customer's bookings for the different trips they have available. The company offers multiple tours which can be booked by many different customers. Given the diagram below, answer the following questions by providing SQL statements. CUSTOMER BOOKING CUST NO CUST FNAME BOOKNG NO TOUR BOOKING EMP ID CUST NO BOOK STATUS CODE 7 TOUR ID 7 80OENG NO TOUR DATE TOUR CUST LNAme CUST ADORESS CUST DOB CUST EMAIL OUT SEAT NO IN SEAT NO CUST, PHONE 1 TOURO TOUR NAME TOUR DESCRIPTON EVENTJD HOTEL_D TOUR PRICE ADULT FUGHT NO BOOK, TOTAL, COST BOOKNG DATE TOUR PRICE CHILD TOUR, PRICE CON…
A business wants to design a database for its daily operations. The business rules are given below. Create an ER diagram with necessary attributes that reflect the given business rules. You might use any style for the ER diagram. If it is applicable, include the cardinality in the diagram and use the diagram to identify weak entities and weak relationships. Business Rules: • A store may place many orders. • An order must be placed by a store • An order contains at least one order line. • Each order line is contained in one and only one order. • Each order line has a specific product written in it. • A product may be written in many orders. • A store may employ many employees • Each employee is employed by one (and only one) store. • An employee may have one or more dependents. • A dependent must be related to an employee.
Although you always wanted to be a dog trainer, you ended up being an expert on databases because you love to work with data and logic. Your old love is still there, however, so you set up a database company, DogTraining, that builds a product for dog kennels. The core of this product is a database with a schema that captures all the information that kennels need to maintain. Kennels keep information about dog trainers, the First and Last names of the dog trainers (which are unique), birthplace, color of the dog trainers hair, and style of training. For each dog, the trainer, the date the dog was born, a name (not unique), the type of dog (e.g., Brittany, German Shepard, Collie, etc.), color of the dog’s hair, and how much weighs must be stored. Dogs are also classified into groups of various kinds, for example, hunting, guard, working; a given dog may belong to more than one group. Each group is identified by a name (like those just given) that describes the group. Finally, kennels…
1. Create a database diagram that shows the relationships between the seven tables in the MyGuitarShop database. (The administrators table is not related to the other six tables.) 2. Design a database diagram for a database that stores information about the downloads that users make from a website. Each user must have an email address, first name, and last name. Each user can have one or more downloads. Each download must have a filename and download date/time. Each product can be related to one or more downloads. Each product must have a name.
A database is being created, and its information is being stored at the physical layer. The data being stored is the information about housing in a metropolitan area, with a primary key being the property tax id, with attributes address, square footage, school district, and neighborhood. When choosing an indexing method, the access of the data is analyzed. When the data is being written to the physical layer, the most common attribute used is the primary key. When the data is being retrieved from the physical layer, the most common attribute used is the neighborhood. Which method of indexing (primary, clustering, or secondary) should be used, and why?
The ABC Engineering (ABCE) has contacted you to create a conceptual model whose application will meet the expected database requirements for the company's training program. The ABCE administrator gives you the description of the training group's operating environment. ABCE has 12 instructors and can handle up to 30 trainees per class ● It offers five Advanced Technology courses, each of which may generate several classes. If a class has fewer than 10 trainees, it will be canceled. Therefore, it is possible for a course not to generate any classes Each class is taught by one instructor Each instructor may teach up to two classes or may be assigned to do research only Each trainee may take up to two classes per year Complete the table to define all of the entities and relationships. First one is done for you. Consider one of the relations as a composite relationship. ENTITY INSTRUCTOR RELATIONSHIP Teaches CONNECTIVITY 1:M ENTITY CLASS
Design an E-R diagram for a database for an airlines system. The database must keep track of customers and their reservations, flights and their status, seat assignments on individual flights and the schedule and routing of future flights. Apply all the database design constraints as much as possible.