Question 1

How can you practice SQL for free?

Accepted Answer

The practice page offers 110+ interactive SQL exercises, organized by difficulty level, with a full solution and table structure for each question. All free, no signup required.

Question 2

Which database is used in the exercises?

Accepted Answer

The exercises are based on the Northwind database — customers, orders, products, employees, and suppliers. The table structure panel on the page shows all the columns so you know what to write against.

Question 3

Is the practice suitable for job interview prep?

Accepted Answer

Yes. The exercises build up gradually from the basics to questions at the level of a data analyst job interview, including JOIN, GROUP BY, subqueries and window functions.

Interactive SQL Exercises