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MockSQL2 Submitted #30

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3 changes: 3 additions & 0 deletions Problem1.sql
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Original file line number Diff line number Diff line change
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WITH CTE AS (SELECT *, DENSE_RANK()
OVER(PARTITION BY product_id ORDER BY year) as 'first_year' from sales )
Select product_id, year as 'first_year', quantity, price from CTE where first_year = 1
2 changes: 2 additions & 0 deletions Problem2.sql
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SELECT customer_id from customer group by customer_id
having COUNT(Distinct product_key) = (Select COUNT(distinct product_key) from product)