The SQL Skill Test on Redrob Skills checks whether you can write queries, joins, and aggregations to solve real database problems — real, task-based problems instead of multiple-choice trivia, the same standard employers expect on day one.

Sample tasks on this test look like: - Write a query joining three tables to return each customer’s total order value. - Find duplicate rows in a table using GROUP BY and HAVING. - Write a subquery to identify employees earning above their department’s average.

Every attempt is graded by Redrob Skills’ AI engine against a fixed rubric, so two candidates doing the same work get scored the same way. You get a fairness summary showing exactly how your result was reached, and the option to request a human re-check if something feels off.

Once you pass, the result becomes part of your single, portable Skill Score on Redrob Skills, verified so any recruiter can check it instantly — no relying on a resume claim. It’s a credential built for data professionals and candidates alike, earned once and carried into every application you make.