Entity-Relationship diagram: Entity-Relationship (ER) diagram is the method to represent the relational database using graphical form. This graphical representation shows only primary elements such as records, types, attributes, relationships between entities, and so on. The graphical representation of the ER diagram clearly describes the relationship among entities. In the diagram, every connector is labeled. On one side it is represented by the value 1, and on the other side it is labeled with the value “M”. This labeling is referred to as “cardinality constraint” of the relationship. Data redundancy: Database is a group of interrelated and organized data which helps to access, manage, and update the data easily. Database should be designed carefully by avoiding inconsistent data, redundant data, and misuse of the data. If same data occurs more than once, then it is called data redundancy. For example, maintaining two same details in two different tables increases the overall database size and both needs to be updated unnecessarily. Otherwise, it may cause error when retrieving the data. Hence, redundant data should be avoided when designing database.

Question

Want to see the full answer?

Answer 1

Question

Chapter 6, Problem 4PE

Program Plan Intro

Entity-Relationship diagram:

Entity-Relationship (ER) diagram is the method to represent the relational database using graphical form.

This graphical representation shows only primary elements such as records, types, attributes, relationships between entities, and so on.

The graphical representation of the ER diagram clearly describes the relationship among entities.

In the diagram, every connector is labeled.

On one side it is represented by the value 1, and on the other side it is labeled with the value “M”. This labeling is referred to as “cardinality constraint” of the relationship.

Data redundancy:

Database is a group of interrelated and organized data which helps to access, manage, and update the data easily.

Database should be designed carefully by avoiding inconsistent data, redundant data, and misuse of the data.

If same data occurs more than once, then it is called data redundancy.

For example, maintaining two same details in two different tables increases the overall database size and both needs to be updated unnecessarily. Otherwise, it may cause error when retrieving the data.

Hence, redundant data should be avoided when designing database.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

module: java Question3: (30 MARKS) Passenger Rail Agency for South Africa Train Scheduling System Problem Statement Design and implement a train scheduling system for Prasa railway network. The system should handle the following functionalities: 1. Scheduling trains: Allow the addition of train schedules, ensuring that no two trains use the same platform at the same time at any station. 2. Dynamic updates: Enable adding new train schedules and canceling existing ones. 3. Real-time simulation: Use multithreading to simulate the operation of trains (e.g., arriving, departing). 4. Data management: Use ArrayList to manage train schedules and platform assignments. Requirements 1. Add Train Schedule, Cancel Scheduled Train, View Train Schedules and Platform Management 2. Concurrency Handling with Multithreading i.e Use threads to simulate train operations, Each…

java: Question 1: (40 MARKS) E-Hailing Bicycle Management System Case Study:An e-hailing company that rents out bicycles needs a system to manage its bicycles, users, and borrowing process. Each user can borrow up to 2 bicycles at a time, specifically for families with children 18 years or below. The system must track the bicycles (name, make, type, and availability) and users (name, ID, and borrowed bicycles). The company also wants to ensure that the system uses a multidimensional array to store information about the bicycles. Requirements: Add and View Bicycles: Borrow Bicycles: Return Bicycles Display Borrowed Bicycles and Search for a bicycle Create a menu-driven program to implement the above. Sample Output: Add Bicycle View All Bicycles Borrow Bicycle Return Bicycle View Borrowed Bicycles Search Bicycle ExitEnter your choice: Question 2 (30 MARKS) Pentagonal Numbers Problem Statement Create a Java program that will display the first 40 pentagonal…

Request for Java Programming Expert Assistance - Module: Java 731 Please assign this to a human expert for detailed Java programming solutions. The AI keeps attempting to answer it, but I need expert-level implementation. Question 1 (40 MARKS) - E-Hailing Bicycle Management System Case Study:An e-hailing company needs a Java system to manage bicycle rentals. Key requirements: Users (families with children ≤18) can borrow up to 2 bicycles. Track bicycles (name, make, type, availability) and users (name, ID, borrowed bikes). Use a multidimensional array for bicycle data. Functionalities: Add/view bicycles. Borrow/return bicycles. Display borrowed bikes and search functionality. Menu-driven program with the following options: Copy 1. Add Bicycle 2. View All Bicycles 3. Borrow Bicycle 4. Return Bicycle 5. View Borrowed Bicycles 6. Search Bicycle 7. Exit Question 2 (30 MARKS) - Pentagonal Numbers Problem Statement:Write a Java program to display the first 40…