Suppose there is a table named messages with columns id, sender_id, receiver_id, and message. What is the approach you would take to determine the set of distinct communicators?
Interview question asked to Data Scientists interviewing at ThoughtWorks, Roku, VeriSign and others: Suppose there is a table named messages with columns id, sender_id, receiver_id, and message. What is the approach you would take to determine the set of distinct communicators?.