Practice Aggregation (3.9) - Entity-Relationship (ER) Model - Introduction to Database Systems
Students

Academic Programs

AI-powered learning for grades 8-12, aligned with major curricula

Professional

Professional Courses

Industry-relevant training in Business, Technology, and Design

Games

Interactive Games

Fun games to boost memory, math, typing, and English skills

Aggregation

Practice - Aggregation

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is aggregation in ER diagrams?

💡 Hint: Think about how relationships can have properties.

Question 2 Easy

Can a relationship have attributes associated with it?

💡 Hint: Recall the WORKS_ON example.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does aggregation in an ER diagram represent?

A relationship as an entity
An entity as a relationship
An attribute of an entity

💡 Hint: Think about the concepts we've covered in class.

Question 2

True or False: Aggregation can be used to relate a relationship itself with another entity.

True
False

💡 Hint: Remember the SPONSOR example.

Get performance evaluation

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Consider an organization with multiple projects. How would you model the WORKS_ON relationship using aggregation to include a SPONSOR entity?

💡 Hint: Think about how to visualize this in an ER diagram.

Challenge 2 Hard

Explain how you could design an ER diagram for a scenario where different roles participate in monitoring projects through aggregation.

💡 Hint: Visualize how relationships can connect with multiple roles.

Get performance evaluation

Reference links

Supplementary resources to enhance your learning experience.