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Calculate the total sales amount for customers born between 1998-01-15 and 2000-01-15.

General/Othermedium0.2 min readPremium
Frequency
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Asked at 1 company
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243
questions in General/Other
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1,863
across 7 categories
Asked at these companies
Aarete
Interview Pro Tip

Pro-Move: 'We have a birth_date index—this cohort query runs 10x faster; we materialize cohort tables for common segments.' Red Flag: Not knowing BETWEEN is inclusive—off-by-one on boundaries.

Key Concepts Tested
joinsparksql
Expert AnswerPremium
41 wordsInterview-ready
**SQL**: SELECT SUM(s.amount) AS total_sales FROM sales s JOIN customers c ON s.customer_id = c.id WHERE c.birth_date BETWEEN '1998-01-15' AND '2000-01-15'. **Note**: BETWEEN inclusive. **Spark**: sales.join(customers, 'customer_id').filter((col('birth_date') >= '1998-01-15') & (col('birth_date') <= '2000-01-15')).agg(F.sum('amount'))....
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