PostgreSQL quiz

Test your PostgreSQL knowledge with a free interactive quiz — 46 questions with answers and explanations. No signup needed to play.

What is normalization in database design?

1. What is normalization in database design?
2. What are the main SQL statement categories?
3. What is the difference between `WHERE` and `HAVING`?
4. What does `ORDER BY` do?
5. What are aggregate functions in SQL?
6. What is a transaction in PostgreSQL?
7. What is a schema in PostgreSQL?
8. What is `LIKE` used for in SQL?
9. What does `DISTINCT` do in a SELECT query?
10. What does `JOIN` do in SQL?
11. What is a `VIEW` in PostgreSQL?
12. What is the difference between `CHAR`, `VARCHAR`, and `TEXT` in PostgreSQL?

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