### Entity-Relationship Cardinality RatiosAn entity-relationship table helps in understanding the various relationships between different entities within a database. Below is the detailed table that outlines some common entities and their cardinality ratios.| | Entity 1 | Cardinality Ratio | Entity 2 ||---|-------------------------|----------------------------------------------------------------------------------------------------------|---------------------|| 1 | Student | 1-many: A student may have more than one social security card (legally with the same unique social security number), and every social security number belongs to a unique student | Social security card|| 2 | Student | | Teacher || 3 | Classroom | | Wall || 4 | Country | | Current President || 5 | Course | | TextBook || 6 | Item (that can be found in an order) | | Order || 7 | Student | | Class || 8 | Class | | Instructor || 9 | Instructor | | Office ||10 | E-bay Auction item | | E-bay bid |#### Explanation:1. **Student - Social Security Card:** A student can have multiple social security cards, but each social security number uniquely identifies one student.2. **Student - Teacher:** This entry indicates a relationship but doesn't specify the cardinality. Generally, a student can have multiple teachers, and a teacher can have multiple students.3. **Classroom - Wall:** This relationship associates a classroom with a wall, indicating that walls are integral parts of classrooms.4. **Country - Current President:** Each country is associated with one current president at a time.5. **Course - TextBook:** A course may have several textbooks, and a textbook can be used in multiple courses.6. **Item (in an order) - Order:** Items are components of orders. An order can contain multiple items.7. **Student - Class:** This indicates that students attend classes.8. **Class - Instructor:** Classes are taught by instructors.9. **Instructor - Office:** Instructors are associated with offices.10. **E-bay Auction item - E-bay bid:** An E-bay auction item can have multiple bids associated with it.This table helps in visualizing the relationships and understanding database design better.

Entity relation, also known as entity-relationship modeling, is a technique used in software…

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Entity 1 Student Student ClassRoom Country Course Item (that can be found in an order) Student Class Instructor E-bay Auction item Cardinality Ratio 1-many A student may have more than one social security card (legally with the same unique social security number), and every social security number belongs to a unique student Entity 2 social security card Teacher Wall CurrentPresident TextBook Order Class Instructor Office E-bay bid

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Entity 1 Student Student ClassRoom Country Course Item (that can be found in an order) Student Class Instructor E-bay Auction item Cardinality Ratio 1-many A student may have more than one social security card (legally with the same unique social security number), and every social security number belongs to a unique student Entity 2 social security card Teacher Wall CurrentPresident TextBook Order Class Instructor Office E-bay bid

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

See similar textbooks

Related questions

Q: A new timestamp is assigned to a transaction that is rolled back in compliance with the timestamp…

A: Given: This is due to the fact that another transaction with a timestamp that is larger than TS(T),…

Q: A. 1 How many primary key in the Flight entity? B. 5 How many tables in the system can Customer…

A: A database consists of tables, each of which has columns and rows. Each row (called a tuple) is a…

Q: A transaction is a logical unit of work in transaction management, as explained. Computer science

A: Introduction: A transaction is a logical unit of work in transaction management, as explained.

Q: university er digram for database. 15 entities. yes at least 10.

A: Here in below I draw ER diagram for University database. Entity Attribute Relationship

Q: Banking system. Draw ER diagram 1-A Customer must have a valid User Id and password to login to…

A: here is the ER Diagram of the Given Banking System.

Q: DATABASE SYSTEMS A language school having branches in different cities provides courses in English,…

A: To address the requirements mentioned and create an Entity-Relationship Diagram (ERD), it can define…

Q: Q: Please describe the lifecycle of an enclave, i.e., how it is created, used, and destroyed?

A: Enclave is a device resource collection consisting of middleware that supports applications that…

Q: Hooking API and Credential API hooking and what are the functions intended to process keystroke.

A: Given: we have to discuss Hooking API and Credential API hooking and what are the functions…

Q: Define the phrase "access."

A: Definition: Access: The Access is been referred to as that of the permission that to use, for using…

Q: To execute the use case Issue certificate, an actor Professor is required; in addition, an actor…

A: Lets see the solution.

Q: Answer the query using SQL. For each department which has more than 5 female employees, retrieve the…

A: In the following Query we will retrieve three things: The department name The number of female…

Q: A university marks processing system functions in the following manner: To make any use of the…

A: The diagram is given in the below step

Q: You are required to draw flow chart of Muscat MobiCare is a Mobile Outlet, which provides Mobile…

A: FLOWCHART

Q: Software Engineering

A: Lets see the solution.

Q: Given: Key Address: 0 – 34 Key Values: PAC, EAT, CAT, TARE, TEAL, PLAY, TUB, TEA, TEAR, BUYS, FLY,…

A: The Answer is

Q: Assume that there is a company planned to deploy their website myclothes.com on AWS cloud, to allow…

A: Inquiry about proposing a system that meets certain requirements as a cloud engineer

Q: Where do you start when making software?

A: When starting to make software, it's important to follow a systematic approach to ensure a…

Q: Salesforce Assignment: Can two users have the same profile? Can two profiles be assigned to the same…

A: All users in a Salesforce org may theoretically have the same profile. A Salesforce profile is a set…

Q: What is the Meaning of ENHANCED_KEY?

A: ENHANCED_KEY An ENHANCED_KEY includes 101 or 102 keys. It is the 12 function key running across the…

Q: This is a definition of explanatory language:

A: The use of language in order to explain, demonstrate, and elaborate on a certain subject, idea, or…

Q: Please help! Campus Housing Example Identify the actors and major use cases for the following…

A: The objective of the question is to identify the actors and major use cases for a campus housing…

Q: Databases: Describe six key aspects of relations that exist in databases.

A: Given: Databases: Describe six key aspects of relations that exist in databases.

Q: Databases: Give six important properties of relations.

A: The six important properties of relations are as follows: Values are atomic. Column values are of…

Concept explainers

Race Condition

A race condition occurs within a critical section when two or more tasks try to access and alter a shared resource simultaneously. As a consequence, the process changes to a state of inconsistency.

Question

### Entity-Relationship Cardinality Ratios

An entity-relationship table helps in understanding the various relationships between different entities within a database. Below is the detailed table that outlines some common entities and their cardinality ratios.

| | Entity 1 | Cardinality Ratio | Entity 2 |
|---|-------------------------|----------------------------------------------------------------------------------------------------------|---------------------|
| 1 | Student | 1-many: A student may have more than one social security card (legally with the same unique social security number), and every social security number belongs to a unique student | Social security card|
| 2 | Student | | Teacher |
| 3 | Classroom | | Wall |
| 4 | Country | | Current President |
| 5 | Course | | TextBook |
| 6 | Item (that can be found in an order) | | Order |
| 7 | Student | | Class |
| 8 | Class | | Instructor |
| 9 | Instructor | | Office |
|10 | E-bay Auction item | | E-bay bid |

#### Explanation:

1. **Student - Social Security Card:** A student can have multiple social security cards, but each social security number uniquely identifies one student.

2. **Student - Teacher:** This entry indicates a relationship but doesn't specify the cardinality. Generally, a student can have multiple teachers, and a teacher can have multiple students.

3. **Classroom - Wall:** This relationship associates a classroom with a wall, indicating that walls are integral parts of classrooms.

4. **Country - Current President:** Each country is associated with one current president at a time.

5. **Course - TextBook:** A course may have several textbooks, and a textbook can be used in multiple courses.

6. **Item (in an order) - Order:** Items are components of orders. An order can contain multiple items.

7. **Student - Class:** This indicates that students attend classes.

8. **Class - Instructor:** Classes are taught by instructors.

9. **Instructor - Office:** Instructors are associated with offices.

10. **E-bay Auction item - E-bay bid:** An E-bay auction item can have multiple bids associated with it.

This table helps in visualizing the relationships and understanding database design better.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Introduction

VIEW

Step 2: Explanation

VIEW

Solution

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

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

DATABASE MANAGEMENT ABC Walk-in Clinic is located in a large metropolitan city in Canada. The clinic staff consists of ten doctors, six nurses, five office secretaries, two administrative assistants and one manager. First time Patients have to visit the clinic personally and fill a registration form that contains their personal and health related information. An office secretary would then enter that information in the computer based information system. Patients may become a permanent patient (at any time) for one of the doctors at the clinic by filling up necessary forms (they are called enrolled patients) or they may choose to come walk-in for every visit. (They usually called walk-in patients) Enrolled Patients may book their appointments online or by calling, the office and one of the secretaries would then book their appointment with their doctor on a particular day/time. Any booked appointment may be cancelled up to 24 hours in advance after which the clinic charges a…
convert this ER- Diagram into Relational Scheme. (in dbms)
Customer ID 123 4 5 6 7 8 9 10 Items of transaction {A,B,E,D}{A,C,D,E}{D,E,A} {E,B,A,C} {B,B,E} {A,E,B} {E,D,E,C} {D,C} {B,D,E} {C,D,E,A} (a) Use the table shown to compute the support for the itemsets {B,D} and {B,C,E}. (b) Use the results in part (a) to compute the confidence for the association rules {b,d} {e} (c) How many itemsets can be generated from these items(d) How many association rules can be generated from the itemset {A,B,C,D,E,F}?
An Azure Domain may be used for a variety of purposes.
In preparation for the opening of the border, the Government of Malaysia plans to develop an Electronic COVID-19 passport information system (eCPIS) to store Malaysian immunization information. You are required to develop this system to keep immunization information and allow passport control officers to retrieve each individual immunization information. eCPIS should contain the following information:Personal information (Name, passport no., age, and gender)Vaccination status (completed 2 doses or partially completed or not taken)Vaccine information (Type of vaccine, Date of receiving vaccine)PROGRAM DESIGN REQUIREMENTS: Design object-oriented programming which demonstrates the use of base class, derived class,inheritance, composition, and friend functions. The program should allow a user to do the following tasks:Enter informationUpdate vaccination information.Search each individual vaccination information status via passport no.list of unvaccinated personslist of individuals who…
Computer Science: What are the benefits of enterprise key.
In the context of databases, the term data redundancy refers to: O Storing the same information in several records O Repeating data on multiple reports O Using foreign keys which duplicate the values of primary keys O All of these are possible examples of data redundancy
An Azure Domain may be used in a variety of situations.
Why are "keep-alive" signals or pings used in some database connections?
Design an asynchronous sequential logic circuit which has inputs (X1 and X2) and one output (Z) the output (z) must go to (1) when at the end of the input sequence (00,10), This output must be maintained (unchanged) for all inputs change until the sequence (11,10) occurs, then the output must go to zero (0). and The output flips when the input is (01,10)