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PR Mock 2 #19

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PR Mock 2 #19

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4 changes: 4 additions & 0 deletions CustomersWhoBoughtAllProducts.sql
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Original file line number Diff line number Diff line change
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SELECT customer_id
FROM Customer
GROUP BY customer_id
HAVING COUNT(DISTINCT product_key) = (SELECT COUNT(*) FROM Product);
3 changes: 3 additions & 0 deletions ProductSalesAnalysis3.sql
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Original file line number Diff line number Diff line change
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WITH FirstYear AS (SELECT product_id, MIN(year) AS first_year FROM Sales GROUP BY product_id)
SELECT s.product_id, f.first_year, s.quantity, s.price
FROM Sales s JOIN FirstYear f ON s.product_id = f.product_id AND s.year = f.first_year;