SQL Fundamentals · Database Basics · Lesson 1 of 17
What is a Relational Database?
Concept
What is a Relational Database?
A relational database organizes data into tables made of rows and columns, with relationships between tables linked by shared keys.
By the end of this lesson
- Explain the core idea behind What is a Relational Database?.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
How to study this page
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in What is a Relational Database?. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Sketch, as a comment, the columns you would need for an orders table.
Need a nudge?
Ask about this lesson or your next move. The guide explains the path without taking the work away from you.
Ready for the next lesson?
Mark this lesson complete when you have finished the exercise.
Loading editor…
Console