SQL Constraints

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In this part you got to know the UNIQUE constraint.

Now, get ready and get to know a NOT NULL constraint.

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15/15 Congratulations

1. Welcome

2. UNIQUE – Introduction

3. UNIQUE – Adding new rows

4. UNIQUE – Adding rows with the same value

5. UNIQUE vs. PRIMARY KEY

6. UNIQUE – Playing around

7. UNIQUE on multiple columns

8. UNIQUE on multiple columns – Playing around

9. Multiple UNIQUE constraints

10. Adding a UNIQUE constraint

11. Adding a UNIQUE constraint with a custom name

12. Removing a UNIQUE constraint

13. Summary

14. Quiz

15. Congratulations

Perfect! This was the last exercise in this part of the course, and you solved it. Congratulations!

In the next part, we'll review a constraint you already know – NOT NULL. See you there!

Click Next exercise to finish this part.

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