Database Systems: Design, Implementation, & Management
11th Edition
ISBN: 9781285196145
Author: Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 19RQ
What two attributes must be contained in the composite entity between STORE and PRODUCT? Use proper terminology in your answer.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Analyze the given entity relationship diagram and answer the following questions.
What is the degree of “has” relationship?
Identify primary key(s)
Identify the category of each attribute
Name the cardinalities
Can you identify what each weak entity are ?
Given the ER diagram above, answer the following questions:
a. Name an entity type that has more than 2 relationships.
b. Name one ket attribute and the entity type it belongs to.
c. Name one one-to-one relationship and the entity types it relates.
d. Name one many-to-many relationship and its entity types.
e. Name one relationship attribute.
f. What is the cardinality of relationship ‘employs’?
g. What is the cardinality of relationship ‘textUsed’?
h. Name one weak entity type
i. Does it have a partial key? If yes, name it. ii. Name its identifying entity type
iii. Name its identifying relationship
Question 2 A bank provides services to customers. The banks is identified by its code and has a name and an address. The bank has several branches. A branch is identified by its code that is unique for a given bank. The branch name and address are also stored in the database.
Customers deal with the bank through the bank branches. So, a customer belongs to a specific bank branch. Customers…
Chapter 4 Solutions
Database Systems: Design, Implementation, & Management
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - Prob. 11RQCh. 4 - Discuss two ways in which the 1:M relationship...
Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9C
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- According to the data model, is it required that every entity instance in the PRODUCT table be associated with an entity instance in the CD table? Why, or why not?arrow_forwardWhat is the term used to describe a non-key attribute in one entity that points to the primary key in another entity?arrow_forwardA manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. Each component can be supplied by one or more suppliers. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used. Create an ERD to show how you would track this information. Show entity names, primary keys, attributes for each entity, and relationships between the entities. Assumptions: • A supplier can exist without providing components. • A component does not have to be associated with a supplier. • A component does not have to be associated with a product. Not all components are used in products. • A product cannot exist without components.arrow_forward
- A manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. One or more suppliers can supply each component. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used. Create an ERD to show how you would track this information. Show entity names, primary keys, attributes for each entity, relationships between the entities and cardinality. Assumptions: A supplier can exist without providing components. A component does not have to be associated with a supplier. A component does not have to be associated with a product. Not all components are used in products. A product cannot exist without components.arrow_forwardWhat is the attribute that could be obtained using other attributes in the Entity-Relationship Diagram? Select one: a.Multi-Valued Attribute b.Derived / Calculates Attribute c.Single-Valued Attribute d.Composite Attributearrow_forwardUsing the following E-R diagram, create a set of 3NF relations. Create all primary keys and nonkey attributes needed for each entity.arrow_forward
- Given the ER diagram to the right, which entity types deserve to stay entity types and which ones should be converted to attribute? Explain why.arrow_forwardPrepare a Crow’s Foot Entity Relationship Diagram for the application described in the following paragraph. Many-to-Many relationships should be broken into two 1-to-Many relationships using a bridge entity. Label PK attributes and FK when applicable. For each entity, you need to define a primary key. If there is a relationship between two entities make sure you define the corresponding foreign key in the child table. Seneca Sandlot Baseball is a recreational baseball league for Seneca students. The league has different divisions for different skill levels. Each player’s skills are evaluated and the player is assigned to a division. A team is made up of many players from the same division, and a coach. A player may play on only one team in the league. Each division is made up of many teams. A coach may coach teams in more than one division , but can only coach one team in each division. A coach may not play on any team in the league. A season is twelve weeks in length.…arrow_forwardIf you have an entity with 100 different attributes, what would be some strategies to model this entity? What are some questions you would want to know about the individual attributes?arrow_forward
- According to the data model, is it required that table every entity instance in the PRODUCT table be associated with an entity instance in the CD table? Why, or why not?arrow_forwardDraw the Enhanced Entity–Relationship (EER) model and the relational schema for the case study below: This case study describes a company called HomeCinema, which rents out videos to its members. The first branch of HomeCinema was established in 1982 in Jeddah but the company has now grown and has many branches throughout the country. As HomeCinema has grown, so has the difficulties in managing the increasing amount of data used and generated by the company. To ensure the continued success of the company, the Director of HomeCinema has urgently requested that a database application be built to help solve the increasing problems of data management. The data held on a branch of HomeCinema is the branch address made up of street, city, state, and zip code, and the telephone numbers (maximum of 3 lines). Each branch is given a branch number, which is unique throughout the company. Each branch of HomeCinema has staff, which includes a Manager, one or more Supervisors, and a number of other…arrow_forwardThe cardinality ratio depends on the real-world meaning of the entity types involved and is defined by the specific application. For the binary relationships below, suggest the cardinality ratios based on your understanding. Clearly state any assumptions you make. 23 Entity 1 Cardinality Ratio Entity 2 1 Student Social Security No. 2 Student Teacher 3 Classroom Wall 4 Course Text Book 5 Class Instructorarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781285196145Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos CoronelPublisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781305627482Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY