SQL interview questions and online tests

The right SQL interview questions and online tests to screen SQL developers

Recommended roles for our SQL online tests

• Analista dati
• Database administrator
• SQL developer
• Database engineer
• Database specialist
• Junior SQL developer
• Middle SQL developer
• Senior SQL developer
• Data entry technician
• Data quality specialist

How our SQL interview questions tests work

Il test della vita reale^TM methodology powers DevSkiller SQL coding tests. Our selection of coding tests will help you analyze your applicants’ knowledge of various SQL versions. In addition to that, our coding tests will help you assess applicants’ coding skills, problem-solving ability, and time management.

Caratteristiche principali

• DevSkiller SQL coding tests measure applicants’ coding ability and not just their academic knowledge
• Remote testing that gives you the freedom and convenience of testing candidates from all over the world
• Il test della vita reale^TM methodology creates a better user experience where candidates can use their own IDE, clone to GIT, run unit tests and access Stack Overlow/Github/Google for research
• Strict anti-plagiarism tool that ensures accurate test results
• Automatically generated results that non-tech professionals can understand
• SQL coding tests available for junior, middle, and senior-level positions

What to look for in SQL developers

SQL is the most popular 4GL (Fourth Generation Programming Language), which means that programmers only declare what the result looks like, rather than how the database should calculate the result. SQL is embedded in other, more general-purpose programming languages like Java to access data from central databases.

A qualified SQL developer should possess well-versed abilities with SQL performance. In addition to this, your successful candidate should possess SQL design skills with demonstrated knowledge of relational theory. Finally, SQL refactoring skills can prove quite useful in larger teams where the SQL is more complex.

Skills covered in our SQL interview questions and online tests

• HSQLDB
• Mongo
• MongoDB
• MSSQL
• MySQL
• NoSQL
• Oracle
• PostgreSQL
• SQL
• CSS
• ES6
• HTML
• Javascript
• PDO

Looks good, but want more?

Do you want to run coding tests in a predefined environment? Perhaps you want to test applicants using your own codebase? At DevSkiller, you can build custom tests using our online task wizard. Solve all of your technical screening needs with our SQL coding tests today.

Want proof that our SQL interview questions and online tests work?

Some recruiters are sure as soon as they hear about our SQL online tests that DevSkiller testing is the tool they need for their business. Don’t worry if you’re still a little unsure though. Being sure how to invest your company’s money can be daunting. So instead of taking our word for it, read what our past customers have to say:

Patrycja Kiljańska - Specialista in acquisizione di talenti presso Spartez

"Abbiamo sostituito una soluzione interna ad alta manutenzione con DevSkiller. Il nostro processo è identico, ma il prodotto ci offre prestazioni migliori. I risultati sono anche molto più facili da valutare".

Richard Williams - Vicepresidente di ingegneria presso Plutora

"Grazie all'automazione della fase di screening, siamo riusciti a ridurre il tasso di colloqui di 50%. Allo stesso tempo, la qualità dei candidati che arrivano alla fase di colloquio è ora molto più elevata. DevSkiller aggiunge un ulteriore livello di qualità al nostro processo di assunzione di personale tecnico".

Magdalena Rogóż – Deputy Marketing Manager at Kodilla

“Using DevSkiller to grade tests is 2 times more cost-efficient while giving our students a much better test and preparing them for future recruitment tests.”

Domande frequenti

Che cos'è RealLifeTesting^TM?

If you have never encountered RealLifeTesting^TM before, you might have a few questions.

At DevSkiller we believe the best way to assess a developer’s skills is to have them do actual development work. Much like how you would test a driver’s skills by asking them to drive. This might seem obvious, but until now developers were tested using academic algorithmic tests that don’t accurately measure their skills in the actual role. Our SQL online tests implement RealLifeTesting^TM to recreate a simulated version of a developer’s average workday and then set them challenges to face within that simulation. By doing this we are able to measure exactly how well each developer candidate performs in various areas, all while maintaining a controlled testing environment.

To perform well during an assessment, the best developers will be those who can effectively demonstrate their skills in coding and their use of resources like Stack Overflow to find solutions to the problems they encounter. The results will show that candidates who have the best coding skills, code cleanliness, and problem-solving skills, are those who gain the highest test score.

Quanto tempo ci vuole per configurare DevSkiller?

From the very beginning, DevSkiller SQL online tests are designed to be as quick as possible to send out, as well as to set-up. Our test library comes packed with default SQL online tests that can be ready to send out as soon as you have created your account. That means you can be testing candidates within a matter of minutes. The default tests have been deliberately set by our experts, loaded with the most popular test settings. If you decide you want to alter these settings, then you can. Our customized tests even allow you to change the duration of the tests, alter the difficulty level, and even affect the time given for each individual question.

Cosa si fa contro il plagio?

You needn’t worry about the possibility of a candidate gaining an unfair advantage while taking our SQL online tests. At DevSkiller we implement a number of anti-plagiarism tools to ensure you only receive accurate results.

Screen recording can be implemented to check whether the candidate is looking only at their own screen or at a different screen as well while taking a test. We can also use a range of social listening tools, check the candidate’s IP address, and use live pair notifications. All of the previous test answers entered into our system are logged and our plagiarism detector also checks these answers against any new answers provided to look for a match. That way if a candidate provides an answer that they stole from a previous test, our system will automatically flag this up. If a candidate’s entered code is repeated elsewhere, we will know about it.

Devo essere un programmatore per usare DevSkiller?

DevSkiller SQL online tests offer many great advantages to any recruiter, but one of the main ones has to be that recruiters, no matter how proficient they are at SQL development themselves, are able to accurately recruit even the most skilled professional. This is because our SQL tests are easy to send out and the results are simple to understand, it is only the tests themselves that can be challenging. Any expertise you have in the subject will certainly help, but effectively this means you don’t have to be an expert to hire one.