AI SQL interviewer
Joins, window functions and query tuning — practice talking through SQL problems and find out which concepts you explain shakily.
Free 10-minute interview with a full report. Paid plans run full-length sessions.
SQL interview questions you might get
A sample of the starting questions. The live interview follows up on your answer, so no two sessions go the same way.
-
Find the second-highest salary in each department.
What it tests: Window functions and ties.
-
What's the difference between WHERE and HAVING? Give an example where only HAVING works.
What it tests: Aggregation fundamentals.
-
Return customers who placed no orders last month.
What it tests: Anti-joins and NULL handling.
-
This query is slow on 50 million rows. What do you check?
What it tests: Indexing and plans.
-
Calculate a 7-day rolling average of daily signups.
What it tests: Window frames.
How a session works
About 20–30 minutes from setup to report. End any time and you still get feedback on what was covered.
-
Set your target
Pick a role, level and stack. Add a job description or your resume if you want questions about your real projects.
-
Answer live
Speak or type. The interviewer follows up on thin answers, raises the difficulty when you're doing well and switches to code when it fits.
-
Read the notes
A report scores every competency, quotes the answers that cost you, and gives you a prep plan for the next session.
A report that quotes you, not a pat on the back
Every score links back to something you actually said.
-
Competency scores
Weighted to the role you picked, so a system design gap counts more for a senior backend role than for a frontend junior.
-
STAR check on every story
See which part of each behavioral answer was missing — usually the Result.
-
How you sounded
Filler words, hedging, "I" versus "we", and whether you cited real numbers — measured from your words, and compared between the first and second half of the interview.
-
A prep plan
The two or three things to practice next, and a skill graph that tracks them across sessions.
Competencies — sample report
STAR — "Tell me about a missed deadline"
How you sounded
Questions
Which SQL dialect?
Standard SQL by default. Mention PostgreSQL, MySQL, SQL Server or BigQuery in your stack for dialect-specific questions.
Who is this for?
Data analysts, data scientists and backend developers — anyone whose interview includes a SQL round.
Do I type queries?
Yes. You can write queries in the editor and explain them; both are reviewed.
Is it free to try?
Yes. Each month you get a free interview of up to 10 minutes with its scored report. Paid plans add full-length interviews, every track and the full 360 report.