SQL (coding): complex queries

Use our SQL (coding): complex queries test to hire the best

About the SQL (coding): complex queries test

In the digital age, data forms the basis of nearly every business. And SQL is the standard query language for managing relational databases. It enables developers to create efficient software quickly by leveraging well-structured data.

Working with SQL databases is part of the day-to-day work of a backend developer. Even if your framework hides SQL behind an ORM, knowing SQL is highly recommended for backend developers working with complex data structures.

This SQL test evaluates candidates' ability to deal with a real-life scenario involving a complex database structure. The test lasts 30 minutes and the objective is to create a query that acts as a report with key insights from the database.

Successful candidates have deep expertise in joining and filtering results. They can manipulate data using simple calculations while taking many details into consideration, such as sorting the data, rounding numbers, excluding irrelevant entries, and filling gaps in the data.

The test ranks candidates using more than 10 different test cases and checking every corner case of the solution.

The test is made by a testpreneur

J. Carlos Calvo Tudela

Computer engineer Carlos’ accomplishments go far beyond earning an International PhD in Engineering and an Executive MBA. He’s also backed by 16 years of professional experience as a full stack software developer.

For the last several years, Carlos has been focusing on Python, Django, Django REST framework, and Angular 2 to 9. Currently managing a team of 30 engineers, he spends the bulk of his time and know-how on the development of web and app ad-hoc software such as SPAs and APIs.

Crafted with expert knowledge

TestGorilla’s tests are created by subject matter experts—our “testpreneurs.” We assess potential testpreneurs based on their knowledge, ability, and reputation. Before being published, each test is peer-reviewed by another expert, then calibrated using hundreds of test takers with relevant experience in the subject. Our feedback mechanisms and unique algorithms allow our testpreneurs to constantly improve their tests.

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FAQs

What is the difference between an assessment and a test?
An assessment is the total package of tests and custom questions that you put together to evaluate your candidates. Each individual test within an assessment is designed to test something specific, such as a job skill or language. An assessment can consist of up to 5 tests and 10 custom questions. You can have candidates respond to your custom questions in several ways, such as with a personalized video.
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Yes! Custom questions are great for testing candidates in your own unique way. We support the following question types: video, multiple-choice, coding, file upload, and essay. Besides adding your own custom questions, you can also create your own tests.
How do video questions work?
A video question is a specific type of custom question you can add to your assessment. Video questions let you create a question and have your candidates use their webcam to record a video response. This is an excellent way to see how a candidate would conduct themselves in a live interview, and is especially useful for sales and hospitality roles. Some good examples of things to ask for video questions would be "Why do you want to work for our company?" or "Try to sell me an item you have on your desk right now." You can learn more about video questions here.
Can you explain how the other custom question types work?
Besides video questions, you can also add the following types of custom questions: multiple-choice, coding, file upload, and essay. Multiple-choice lets your candidates choose from a list of answers that you provide, coding lets you create a coding problem for them to solve, file upload allows your candidates to upload a file that you request (such as a resume or portfolio), and essay allows an open-ended text response to your question. You can learn more about different custom question types here.
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Can I combine the SQL (coding): complex queries test with other tests?
Yes. You can add up to five tests to each assessment.
Where in my recruitment process should I use the SQL (coding): complex queries test?
We recommend using our assessment software as a pre-screening tool at the beginning of your recruitment process. You can add a link to the assessment in your job post or directly invite candidates by email. TestGorilla replaces traditional CV screening with a much more reliable and efficient process, designed to find the most skilled candidates earlier and faster.
What kind of coding and programming tests does TestGorilla offer?
We offer coding tests for the following languages: Python, JavaScript, PHP, Java, C, C++, C#, and SQL. These tests feature small coding tasks for a candidate to complete. We also offer multiple-choice tests for web and mobile development framework, such as our Angular, React and Django tests.

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