One SQL question almost EVERY big tech interviewer asks 👇

One SQL question almost EVERY big tech interviewer asks 👇

💥 Find duplicate emails/users

sql SELECT email, COUNT(*) AS cnt FROM users GROUP BY email HAVING COUNT(*) greater than 1;

🚀 This tests:
- GROUP BY
- HAVING
- Real-world data cleaning skills

Because in actual companies…
duplicate data = huge business problem.

Видео One SQL question almost EVERY big tech interviewer asks 👇 канала Mohammad Rahmatullah