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MockSQL2 completed #15

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MockSQL2 completed #15

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5 changes: 5 additions & 0 deletions Customers Who bought all products.sql
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Original file line number Diff line number Diff line change
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SELECT c.customer_id
FROM Customer c
LEFT JOIN product p ON c.product_key = p.product_key
GROUP BY c.customer_id
having COUNT(DISTINCT c.product_key) = (SELECT COUNT(p1.product_key) FROM product p1)
5 changes: 5 additions & 0 deletions Product Analysis iii.sql
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select s1.product_id, s1.year as first_year, s1.quantity, s1.price
from sales s1
where (s1.product_id, s1.year) in ( select s2.product_id, min(s2.year)
from sales s2 group by s2.product_id)