PostgreSQL quiz

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

What does ACID stand for in database transactions?

1. What does ACID stand for in database transactions?
2. What is the difference between `WHERE` and `HAVING`?
3. What is `LIKE` used for in SQL?
4. What is a NULL value in SQL?
5. What is a `CHECK` constraint?
6. What are the main SQL statement categories?
7. What is PostgreSQL?
8. What does `DISTINCT` do in a SELECT query?
9. What is `SERIAL` in PostgreSQL?
10. What are aggregate functions in SQL?
11. What is a transaction in PostgreSQL?
12. What is `COALESCE()` in PostgreSQL?

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