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SQL Knowledge

SQL was long the language of the IT department. Today, everyone who works with data writes SELECTs: analysts, marketers, controllers, operations. Anyone who doesn't master SQL stays dependent on someone else for the simplest question. The SQL Assessment measures in multiple-choice questions whether a candidate masters the basics and the advanced thinking: SELECT statements, JOINs, aggregations, subqueries. For roles where pulling data from a database independently makes the difference.

Time

~15 minutes

Type

Hard skills test

Form

Multiple choice

Perfect for:

Data analysts, Business analysts, BI specialists, Marketing analysts, Finance analysts, Revenue operations, Junior data engineers, Backend developers

Data analysts, Business analysts, BI specialists, Marketing analysts, Finance analysts, Revenue operations, Junior data engineers, Backend developers

Contact us for a demo of this test

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More than 500 companies worldwide already trust Selection Lab

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Graph illustrating the progression from an initial point to an advanced stage with steps labeled as launched and maturing, showing growth in capabilities.

Graph illustrating the progression from an initial point to an advanced stage with steps labeled as launched and maturing, showing growth in capabilities.

3 Reasons we love this assessment

01

Knockout on the query

Anyone who can't write a JOIN can't combine data. A first filter that decides in fifteen minutes who can work with data independently.

02

From SELECT to subquery

Three levels in one test: basic SELECTs, JOINs and aggregations, and advanced subqueries and CTEs. Junior versus senior in one measurement.

03

Real data questions, not a textbook

The questions are about scenarios you meet in practice: finding customers without orders, preventing duplicate rows, building a report from scratch.

Technical Details

Self-developed by Selection Lab.

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Information

Three levels

Basic (SELECT, WHERE, ORDER BY), intermediate (JOINs, GROUP BY, aggregations) and advanced (subqueries, CTEs, window functions).

Multiple choice, knockout format

No open answers, no subjective grading. Immediately clear who has the basics and who doesn't, so you can move on with the candidates who matter.

Under time pressure

The test has a fixed time limit. Candidates answer as many questions as they can within that time, so you measure not just knowledge but also pace.

Instant insight for the recruiter

After the test the score lands in your dashboard right away. No waiting, no manual review. Decision-ready in an hour.

Measurement
Objectives

The Big Five Personality Model assesses key personality traits that influence behavior and performance:

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SELECT & filtering

The basis of every query. SELECT, WHERE, ORDER BY, LIMIT and the difference between filters that work and those that don't.

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JOINs

INNER, LEFT, RIGHT, FULL. The biggest source of mistakes in SQL and the most important skill to combine data.

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Aggregations & GROUP BY

SUM, COUNT, AVG with GROUP BY and HAVING. From raw data to summaries the business can actually use.

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Subqueries & CTEs

Nested queries, common table expressions, and knowing when to use which to answer complex questions in a readable way.

Want to add this assessment to your selection flow?

Give us a call and we can talk you through how it works and find what assessments will find you the best candidates.

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