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ISBN: 9781259852183
Author: Paige Baltzan, Amy Phillips
Publisher: McGraw-Hill Education
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Chapter 6, Problem 5MBD
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Entities and Attributes:
The different types of entity classes that Mr. M will use would include the vendors and the classes of equipment. And these classes refer to the different sports.
- Total effort
- Sam sports
- The underline
- Maximum workout
- Basketball equipment
- Aerobics equipment
- Tennis equipment
- Golf equipment
- Swimming equipment
Count of attributes that will be applicable to the above mentioned entities will actually be less and only relevant attributes will be included...
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Question 1
a) Give an example of three entities that might exist in a database for a medical office, and list some attributes that would be stored in a table for each entity.
b) What is a relationship, and what three types of relationships exist? Give an example of each of the three types of relationships as per your example of entities in part (a)
Question 2
Identifies the Entities and Draw an ER diagram for the following scenario:
a) A college needs to track placement test scores for incoming students. Each student can take a variety of tests, including English and math. Some students are required to take placement tests because of previous coursework.
b) Every employee in a company is assigned to one department. Every department can contain many employees.
c) Data for an information technology conference needs to be collected. The conference has a variety of sessions scheduled over a two-day period. All attendees must register for the sessions they plan to attend. Some…
Using er assistant create an Entity Relationship Diagram(ERD) with appropriate entries, relevant attributes, and relations to support the following business rules, and write a few lines to defend your erd.
You need to design a database to keep track of clubs at a high school.
Attributes:
A student may only join one club
Some students do not join at all
Club needs to have one student
Need to capture students:
Name
Address
Year of grad
All Phone numbers
Club name
Club advisor
Meeting dates
Production tracking is important in many manufacturing environments (e.g., the pharmaceuticals industry, children’s toys, etc.). The following ER diagram captures important information in the tracking of production. Specifically, the ER diagram captures relationships between production lots (or batches), individual production units, and raw materials.(ER Diagram in photo)
I) Please convert the ER diagram into a relational database schema. Be certain to indicate primary keys and referential integrity constraints
ii. Please identify an attribute in the above ER diagram that might represent a composite attribute, and explain why/how it might represent a composite attribute.
iii. Please identify an attribute in the ER diagram that could represent a derived attribute and explain why/how it might represent a derived attribute.
iv. The ER diagram/relational database schema contains several instances of data redundancy. Please identify one instance where a data redundancy issue exists.
v. The…
Chapter 6 Solutions
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- A new sales ordering system needs a relational database that contains a customer table, a product inventory table, and an order table. Use a word-processing, graphics, or spreadsheet program to draw an entity-relationship diagram showing the relationships among these entities. Next, design each of these tables showing the keys and attributes to be included in each table. Include five sample records for each table.arrow_forwardPlease read the instructions carefully;1. Find a domain to design your database. Examples: University database, Flightreservation system, etc. Note: Please do not use these. As discussed in the class, try tochoose a domain which is not explored much / your own family business.2. Collect the necessary information to model the database for the chosen domain.3. Identify entity sets, relationship sets, attributes etc.4. Draw the ER diagram5. Reduce the ERD into conceptual schema by applying appropriate rules.6. Normalize each schema upto BCNFarrow_forward1. Create an entity relationship diagram for the conceptual design using UML notation. The diagram can be created by hand or via some modeling tool. 2. Create a data dictionary for the entities, relationships and attributes. Make your best guess for representing the attributes. Schema 3 You have been hired by the Snowbird ski mountain resort to build a database for their data. The resort has ski mountain peaks, chair lifts, trails, stores and restaurants. For each mountain peak, you track the name, the elevation and its latitude and longitude. Each peak name is unique. The names of the mountain peaks are: Mount Superior, Mount Baldy, Twin Peaks and Hidden Peak. For each chair lift, you track a unique name, the vertical rise, the travel time, the number of people per chair (ranging from 2 to 4) , and its closing time. For each trail, you track its unique name, its elevation, its length, and the typical time it takes to complete. Each ski trail is classified by its level of…arrow_forward
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