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How do you handle date/time analysis in SQL (truncation, intervals, time zones)?

Time-based analysis is everywhere in analytics, and time zones and bucketing are the common traps. The signal is DATE_TRUNC for bucketing, interval math, and storing UTC.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Time-based analysis is everywhere in analytics, and time zones and bucketing are the common traps. The signal is DATE_TRUNC for bucketing, interval math, and storing UTC.

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