SQL

Can you explain how you would extract the unique communicators from a messages table in SQL, which contains columns id, sender_id, receiver_id, and message?

Was asked at

Practice this question with AI

First session is free - no credit card required.

Go Premium

More interviews, more skills, more success.

Practice More Questions

No answers yet

Be the first to share your approach to this question

✓ Trusted by Data Scientists

Stop Winging It. Start Using Frameworks.

The structured approach to acing interviews

Proven frameworks for analytics cases, ML, and experimentation
See adequate vs great answers side-by-side
Real case breakdowns with expert analysis
Master storytelling and advanced interview skills

This course taught me the difference between answering questions and nailing interviews. The frameworks are pure gold.

— David L., ML Engineer

Start Learning Now →See Full Curriculum

Interview question asked to Data Scientists interviewing at GitHub, Airbnb, trivago and others: Can you explain how you would extract the unique communicators from a messages table in SQL, which contains columns id, sender_id, receiver_id, and message?.