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Identify the top 5 customers with the highest purchases in the last quarter.

General/Othermedium0.5 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
Aarete
Key Concepts Tested
bigquerypartitionsnowflakesqlwindow
Expert AnswerPremium
93 wordsInterview-ready
Use window/ranking with clear assumptions. SQL (BigQuery/Snowflake): WITH quarterly AS (SELECT customer_id, SUM(amount) total FROM transactions WHERE transaction_date >= DATE_SUB(CURRENT_DATE(), INTERVAL 3 MONTH) GROUP BY customer_id), ranked AS (SELECT customer_id, total, RANK() OVER (ORDER BY total DESC) rk FROM quarterly) SELECT customer_id, total, rk FROM ranked WHERE rk <= 5....
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