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Calculate a 7-day moving average of orders for each city in the Swiggy database.

General/Othermedium0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Swiggy
Interview Pro Tip

Pro-Move: 'We partition by city_id and use ROWS—city-level aggregation is dense; RANGE adds overhead.' Red Flag: Forgetting PARTITION BY city_id—mixing cities in one average.

Key Concepts Tested
partitionsparksqlwindow
Expert AnswerPremium
38 wordsInterview-ready
**SQL**: SELECT city_id, order_date, order_count, AVG(order_count) OVER (PARTITION BY city_id ORDER BY order_date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW) AS ma_7d FROM daily_orders. **Spark**: Window.partitionBy('city_id').orderBy('order_date').rowsBetween(-6, 0)....
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