Welcome to your interview.
The question is on your right: SQL and Visualization for Transactions. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
What SQL functions or data visualization techniques do you rely on most when analyzing large Spectrum customer transaction datasets?