Sql: Subqueries & Ctes

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About this quiz

Master programming concepts with hands-on coding challenges. Write, debug, and optimize code with real-time feedback and explanations.

01Complete the query to return the department name and the number of employees in each department using a CTE.
02Fill in the blank to select employees who earn more than the average salary across all employees.
03Given the following query, what will be its output?
04What is the output of the following query?
05This query is supposed to select all departments with more than 5 employees, but it returns an error. Identify the bug.

What does the "Sql: Subqueries & Ctes" code quiz cover?

This quiz tests knowledge of SQL subqueries and Common Table Expressions (CTEs) through practical query completion and output prediction.

How many questions are in this code quiz?

This code quiz has 7 questions at intermediate difficulty. Each question includes an explanation so you learn as you go.

Is this code quiz free to take?

Yes. You can take this code quiz for free on SkillDojo, and generate your own on any topic in seconds with AI.