Where can I practice SQL problems for interviews?

LeetCode has SQL problems too. The Top SQL 50 study plan is a straightforward place to start if you want a focused set rather than sorting through the whole problem collection.

If you're still getting comfortable with the basics, start with SQLBolt. Then try HackerRank or LeetCode for more interview-style questions. That gives you a way to learn the concepts before tackling a bunch of standalone problems.

Interview Query is another option to look at for interview preparation. It might be worth comparing its SQL practice with the other sites to see which format you prefer.

Don't overlook the basics while chasing tricky puzzles. Some SQL skill checks focus on reporting from tables, joining data, and applying those skills to a specific problem. There can also be an obscure knowledge question, so the format won't necessarily feel like an algorithm challenge.