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Interviewers ask this kind of question to surface how you think, not what you remember. The strongest answers are specific, calmly told, and end on what changed.

SQL · Window functions

From a transactions table with account_id, transaction_ts, and amount, write a query to detect accounts with suspicious activity: three or more transactions over $5000 within any 10-minute window.

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From a transactions table with account_id, transaction_ts, and amount, write a query to detect accounts with suspicious activity: three or more transactions over $5000 within any 10-minute window.

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