Problem
How do you write complex SQL joins, window functions, and aggregations to extract features from relational databases?
Practicing as: Data Scientist interview at HCLTechHi, I'll play your HCLTech interviewer for the Data Scientist role. Candidates describe these interviews as mostly positive and moderately difficult, so expect me to be friendly and conversational. Take your time with the question above and answer like we're in the room.
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